CN111567341A

CN111567341A - Method for producing rice by using duck frog to prevent diseases, control pests, control weeds and lose weight

Info

Publication number: CN111567341A
Application number: CN202010443724.9A
Authority: CN
Inventors: 张舒; 孙贤海; 吕亮; 付维新; 严斌; 彭松林; 常向前; 谢远珍; 杨小林; 王佐乾
Original assignee: Shishou Agricultural Technology Extension Center; Institute of Plant Protection and Soil Fertilizer of Hubei Academy of Agricultural Science
Current assignee: Shishou Agricultural Technology Extension Center; Institute of Plant Protection and Soil Fertilizer of Hubei Academy of Agricultural Science
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-08-25

Abstract

The invention belongs to the technical field of prevention and control of rice weeds, and discloses a method for producing rice by using duck frogs to prevent diseases, insects and control weeds and reduce weight, wherein green manure milk vetch is planted in autumn and winter, the milk vetch is ploughed when the biomass of the milk vetch reaches the maximum after flowering, no water is ploughed, the milk vetch is dried for 7-10 days, the milk vetch is soaked for 3-5 days, the rice is transplanted by a land preparation machine, and water is irrigated for 7-10 cm; 15 rice ducks 15 days old, namely Dongting sheldrake ducks, are put into each mu after 15 days of rice transplanting; then, according to the weed occurrence condition in the field, a proper amount of duck is added to the area with high weed occurrence density, so that the problem of the weed damage can be solved. The invention can efficiently solve the whole-course weed damage, the generation amount of monocotyledon weeds can be reduced by 99.7% in the early stage, the generation amount of dicotyledon weeds can be reduced by 52.8%, compared with the conventional chemical weeding of the middle rice, namely 'one-sealing two-killing three-supplementing', the generation amount of monocotyledon weeds can be reduced by 65.6%, the generation amount of dicotyledon weeds can be reduced by 100%, and the generation amount of single-double total weeds can be reduced by 92.1%.

Description

Method for producing rice by using duck frog to prevent diseases, control pests, control weeds and lose weight

Technical Field

The invention belongs to the technical field of prevention and control of rice weeds, and particularly relates to a method for producing rice by preventing diseases, pests and controlling weeds of duck frogs and losing weight.

Background

At present, rice production refers to a production system of organisms and products thereof obtained by using no chemically synthesized fertilizer, pesticide, growth regulator and the like in the whole growth period of rice, and also does not adopt genetic engineering. The core of the method is to establish and restore virtuous circle of an agricultural ecosystem so as to maintain sustainable development of agriculture. The rice production achieves the effect of improving soil fertility by using organic fertilizers and appropriate cultivation and breeding measures, and diseases, insects and weeds are controlled by a natural method, such as reasonable rotation, agricultural control, biological insect control, natural enemy protection and the like. In the planting process of organic rice, no effective method is available for controlling the growth of weeds and killing weeds, if the weeds are not removed in time, the weeds compete for fertilizer and sunlight with the rice, the yield and the quality of the rice are affected, the weeds are more serious than others year by year, and the problem of the weeds becomes very prominent. Finally, the herbicide has to be used in the field, the herbicide application accounts for 40-60% of the total pesticide usage amount, the herbicide usage mode is changed from the original 'one-seal two-killing three-supplement' mode to the current 'two-seal two-killing mode', and the herbicide usage amount per mu reaches 200-400 g. The grass-phase dominant population is selected from the group consisting of paspalum vaginatum, mesona striifolia, paspalum barnyardum, Leersia hexandra, Euphorbia lathyris, Sparganium stoloniferum, Cyperus rotundus, Arrowia trifoliata, monochoria vaginalis, Epimeria indica, etc. In the case where herbicides cannot be used, only artificial weed removal is often used. The manual weeding efficiency is low, the labor intensity is high, and the working conditions are hard.

In summary, the problems of the prior art are as follows: the manual weeding efficiency is low, the labor intensity is high, and the working conditions are hard. Therefore, in the process of planting rice, the control of the growth of weeds and the elimination of weeds are the problems of being very painful for farmers at present and are the bottleneck of large-scale rice planting.

The difficulty of solving the technical problems is as follows:

firstly, the herbicide species change little, and the problem of weed resistance remaining is more prominent. The herbicide treatment area of the herbicide in China is rapidly increased by 690% in 25 years from 50 years, 1986-2011, but the structure of the herbicide species in China is basically not changed remarkably in the last 25 years. The current herbicide varieties used in rice fields mainly comprise sulfonylurea herbicides, amide herbicides and synthetic hormone herbicides. Due to the rapid popularization and successive year use of selective herbicides with the same action mechanism of sulfonylureas, amides and synthetic hormones during the period of 1986-2011, under the selection action and pressure of the herbicides, after 15 years (2000), drug-resistant weeds which are not sensitive to the herbicides and drug-resistant weed populations generated due to gene mutation begin to rapidly rise and spread, so that main weeds in the rice field are resistant weeds. The main points are as follows: (1) part of broad-leaved weeds such as the monochoria vaginalis and the like and the sedges generate obvious resistance to sulfonylureas. The application dosage of the bensulfuron methyl is about 15g (ai) per hectare, the current application dosage is 45g (ai) per hectare, which is 3 times of the annual popularization dosage, the monochoria vaginalis has obvious resistance to the bensulfuron methyl, and simultaneously the orthogonal cross resistance of the bensulfuron methyl, the pyrazosulfuron methyl and the flucetosulfuron is obvious. Resistant wild water chestnuts and monochoria vaginalis in rice areas in Yangtze river basin gradually appear, farmers reflect that the effects of herbicides such as bensulfuron-methyl and pyrazosulfuron-ethyl begin to slide down, and the herbicide cannot be effectively prevented and removed under the condition of double use. (2) Barnyard grass is resistant to butachlor (amides). The drug resistance of the barnyard grass is not obvious in the area with the service life of the butachlor below 5 years, but the control effect of the butachlor is seriously reduced in the area with the service life of 8-12 years, obvious drug resistance is generated, and the level of the resistance of the butachlor is positively correlated with the service time. The resistance level of the barnyard grass to butachlor in rice areas in China shows certain regularity: the double-cropping rice area is larger than the single-cropping rice area; the single and double rice regions are arranged between the two rice regions; the resistance level tends to increase gradually and obviously from north to south. (3) Barnyard grass is resistant to quinclorac (a synthetic hormone). Quinclorac has been widely used for over 20 years so far, and is still the mainstream anti-barnyard-grass pesticide for paddy fields at present. However, quinclorac has many defects in long-term use, and on one hand, the quinclorac has a narrow weed control spectrum and is almost ineffective to other weeds in rice fields such as moleplant seed; the requirement on the leaf age of rice is high when the pesticide is applied, the risk of phytotoxicity when the pesticide is used in a seedling raising field is large, and the risk of phytotoxicity of next crop is also large; due to long use history, most of the barnyard grass in the rice field generally generates drug resistance, and the weeds in the rice field are various in variety and have large grass phase change. As for barnyard grass, the barnyard grass in the paddy field mainly comprises rice barnyard grass, bali barnyard grass, cilostachys barnyard grass, long woolly wild barnyard grass, fallen larch grass and the like, wherein the most difficult control is realized by the closest relationship between the rice barnyard grass and the rice, and the yield and the quality of the rice are seriously influenced. The damage of barnyard grass is the most direct and serious. When 3 barnyard grass plants are planted in each rice cluster, 71.10% of yield can be reduced. The barnyard grass harm is one of the main limiting factors for improving the yield of rice.

Thirdly, the cultivation mode is various, and the reproductive capacity of weeds is enhanced. Taking semen Euphorbiae as an example, the areas of light and simple planting modes such as direct seeding rice, mechanical transplanting, seedling throwing and the like are gradually enlarged in recent years, and the early-stage water slurry management of the rice planting modes requires that the field surface is kept moist or irrigated with shallow water, so that the characteristics of xerophyte and hygrophism of semen Euphorbiae are met, and the method is very suitable for the generation of semen Euphorbiae. Semen Euphorbiae is annual weed of Euphorbiae Lathyridis of Gramineae, and has strong vitality and fertility. In direct seeding rice fields and in fields with water shortage after seedling planting, the damage of the moleplant seeds is serious. The moleplant seed is almost the same as barnyard grass before the 5-leaf stage, and the leaf is smooth and unhaired, but the leaf has membranous leaf tongue at the leaf pillow part. After the 6-leaf stage, creeping growth begins, the stem node grows to the ground and starts to branch, and the stem node is in a bushy state quickly. The stephania japonica is brittle and easy to break, the color of the leaves is similar to that of rice leaves, manual removal is difficult, and the herbicide is required to be applied for prevention and removal.

And fourthly, perennial weeds in dry land enter the army paddy field. The paspalum distichum and the rice Leersia hexandra Swartz are perennial weeds and have strong drug resistance to common conventional medicaments. In recent years, grass-phase succession occurs in part of gramineous weeds in rice areas, paspalum distichum and Leersia graminea become dominant weeds gradually, the occurrence frequency is high, the density is increased, the harm is increased, the serious threat to rice production is formed, and the weeds become new problems of paddy fields. The significance of solving the technical problems is as follows:

firstly, the weeds are prevented from competing for water, fertilizer, light and the like with the rice. The weed has huge root system and strong water and fertilizer consumption capability. When annual weeds are 100 per square meter to 200 per square meter, the yield of grains is reduced by 50 kg to 100 kg during receiving, and weeds absorb 4 kg to 9 kg of nitrogen, 1.2 kg to 2 kg of phosphorus and 6.5 kg to 9 kg of potassium per mu of field.

And secondly, the occurrence of rice diseases and insect pests is reduced. Many weeds are intermediate hosts of crop diseases and insect pests, and because the weeds are vigorous in vitality and are not few plants growing for two years or more, germs and pests often live or overwinter on the weeds and are harmed on crops after the crops grow out.

Thirdly, the formation of wasteland is avoided. Weeds in the rice field invade the ground and underground space, influence photosynthesis of rice and interfere growth of the rice. The seed quantity of the weeds in the paddy field in production far exceeds the seeding quantity of the paddy rice, and the seedlings emerge early and quickly, so that the wasteland is easy to form.

Fourthly, the agricultural cost is reduced and the income is increased. At present, farmers take 1/3-1/2 of the field labor amount in weeding workers, particularly, the direct seeding on dry paddy fields is popularized in a large area, weeds are regenerated all over the land, the efficiency of the cultivated land is influenced by the weeds, and the working time is prolonged.

Fifthly, the yield and the quality of the rice are improved. Because weeds directly and indirectly damage crops in the aspects of soil nutrients, moisture, crop growth space, pest and disease transmission and the like, the yield and the quality of the crops are finally influenced, such as: the influence of sandwich barnyard grass of rice on the yield is very obvious, and when 1, 2 and 3 barnyard grass plants exist in a cluster of rice, the yield of the rice is correspondingly reduced by 35 percent, 62 percent and 88 percent.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a method for producing rice by preventing diseases, pests and controlling grass of duck frogs and losing weight.

The invention is realized in such a way that a method for producing rice by using duck frog to prevent diseases, pests, control grass and lose weight comprises the following steps:

planting green Chinese milk vetch in autumn and winter, dry ploughing without water, dry drying, retting, transplanting rice seedlings and irrigating;

step two, carrying out waterless dry ploughing, turning over and pressing, dry drying, retting and soaking, transplanting rice seedlings and irrigating in the next year of the astragalus sinicus full-bloom period; applying organic fertilizer or decomposed cake fertilizer in combination with land preparation; applying additional fertilizer in the tillering stage and the heading stage, and applying decomposed cake fertilizer;

thirdly, feeding ducks 15 days after rice transplanting, and feeding the ducks according to the density of weeds in the field;

and step four, putting the frogs, expelling the ducks out of the field, putting the frogs to deinsectize until the rice is harvested.

Further, the first step specifically includes: planting green manure milk vetch every 667m in autumn and winter²The seed consumption is 1.75kg, and rhizobium is inoculated before sowing.

Further, the second step comprises: in the next year, the biomass reaches the maximum in the full-bloom stage of the milk vetch, and the water-free dry ploughing, pressure-turning, dry drying for 7-10 days, retting for 3-5 days, land preparation and seedling transplanting are carried out, and water is filled for 7-10 cm; combined soil preparation every 667m²Applying organic fertilizer for 1-2 t or decomposed cake fertilizer for 0.5 t.

Further, the second step comprises: applying additional fertilizer every 667m in tillering stage and ear stage²Applying 0.1t-0.2t of decomposed cake fertilizer.

Further, feeding ducks in the third step, and after 15 days of transplanting, feeding 15 rice ducks of 15 days old, namely the Dongting ducklings per mu; and then, according to the weed occurrence condition in the field, feeding a proper amount of duck to the area with high weed occurrence density.

Further, in the fourth step, the ducks are moved out of the field in 7 middle-month ten days, and every 667m²60-80 frogs of about 50g are thrown in; the frog can return to nature without recovery.

In summary, the advantages and positive effects of the invention are: the green manure occupies the ecological niche of the field, inhibits the survival space of weeds, is dry-ploughed and dried in the sun, and produces high-temperature and high-concentration green manure fermentation liquid through fermentation of the green manure to inhibit weed seeds and tuber germination.

Dry ploughing, drying in the sun, fermenting with green manure to generate high temperature, germinating part of weed seed tuber in advance, irrigating, soaking, and mechanically preparing land to kill weed.

After transplanting, the rice seedlings are irrigated with 7-10 cm deep water to inhibit the growth speed of weeds, so that the possibility of solving the weeds after 15 days of rice and duck sowing is provided.

The rice and duck eat the weed seeds and tubers on the ground surface, eat the small grass, and pedal to die the small grass during sports.

According to the method, the whole-course green prevention and control technology of the rice, the green manure, the whole machine tillage, the proper water layer and the rice duck are utilized, the whole-course weed can be efficiently solved by the technology of controlling the grass by the green manure, inhibiting the grass by water and weeding by the duck, the generation amount of monocotyledonous weeds can be reduced by 99.7% in the early stage, the generation amount of dicotyledonous weeds can be reduced by 52.8%, compared with the chemical weeding of one-sealing-two-killing-three-complementing of the rice in the conventional pesticide application in the later stage, the monocotyledonous weeds can be reduced by 65.6%, the dicotyledonous weeds can be reduced by 100%.

The invention uses green manure to control grass, uses water to inhibit grass and uses duck to weed, and the invention is matched with the three parts, and organically combined, namely, the growth amount of the green manure is large, the plowing and dry sunning are sufficient, the retting, soaking and fermentation are good, the field preparation is careful, the water-retaining layer inhibits the growth speed of weeds after the rice and duck are transplanted, when the rice and duck are planted in the field, the weeds are below the water layer, the rice and duck are planted in the field at the right time, 15 weeds are planted per mu, and the invention can solve the whole.

Drawings

FIG. 1 is a flow chart of a method for producing rice by using duck frogs for disease prevention, insect control, grass control and weight reduction according to an embodiment of the invention.

FIG. 2 is a schematic diagram of rice production by using duck frogs for disease prevention, insect control, grass control and weight reduction according to the embodiment of the invention.

FIG. 3 is a graph showing the change in the rate of the root of the rhizoctonia solani disease provided in the examples of the present invention.

FIG. 4 is a dynamic graph of the number of rice planthoppers on two regions according to the embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The manual weeding efficiency is low, the labor intensity is high, and the working conditions are hard. Therefore, in the process of planting rice, the control of the growth of weeds and the elimination of weeds are the problems of being very painful for farmers at present and are the bottleneck of large-scale rice planting.

Aiming at the problems in the prior art, the invention provides a method for producing rice by using duck frogs to prevent diseases, control pests and control grass and lose weight, and the invention is described in detail below by combining with the attached drawings.

As shown in fig. 1, the method for producing rice by using duck frogs to prevent diseases, control pests, control weeds and lose weight provided by the embodiment of the invention comprises the following steps:

s101: planting Chinese milk vetch. Planting green manure milk vetch every 667m in autumn and winter²The seed consumption is 1.75kg, and rhizobia can be inoculated before sowing.

S102: and (5) filling deep water. In the next year, the astragalus sinicus full bloom stage (the biomass reaches the maximum), dry ploughing without water, turning over and pressing, dry drying for 7-10 days, retting for 3-5 days, transplanting seedlings by a land preparation machine, and irrigating for 7-10 cm. Combined soil preparation every 667m²Applying organic fertilizer for 1-2 t or decomposed cake fertilizer for 0.5 t. Applying additional fertilizer every 667m in tillering stage and ear stage²And (3) applying 0.1t-0.2t of decomposed cake fertilizer, and ploughing when the biomass of the milk vetch is maximum near flowering.

S103: and (5) putting the ducks. 15 rice ducks 15 days old and 15 Dongting sheldrake ducks are put into each mu after 15 days of rice transplanting; then, according to the weed occurrence condition in the field, a proper amount of duck is added to the area with high weed occurrence density, so that the problem of the weed damage can be solved.

S104: and (5) putting the frog.After the ducks are driven out of the field, every 667m²About 50g of about 60-80 frogs are thrown in the container. Deinsectization is carried out by utilizing the predation characteristic of the frogs until the rice is harvested. The frog can return to nature without recovery.

The green manure provided by the invention occupies the ecological niche of the field, inhibits the survival space of weeds, is dry-ploughed and dried, and produces high-temperature and high-concentration green manure fermentation liquor through fermentation of the green manure to inhibit weed seeds and tuber germination.

The dry ploughing dry sunning green manure provided by the invention generates high temperature through fermentation to ensure that partial weed seed tubers germinate in advance, and then the mechanical land preparation is carried out to kill weeds through water closing and retting.

The water with the depth of 7-10 cm after the rice transplanting provided by the invention can inhibit the growth speed of weeds, and the possibility of solving the weeds when rice and ducks are put into the field after 15 days is provided.

The rice duck provided by the invention eats weed seeds and tubers on the ground surface, eats small grass, and pedals to die the small grass by sports.

The present invention will be further described with reference to the following examples.

For 2016, 28km around Qinke lake of Shanxi town, Shi Gou City²The closed area is designed and created as a 'Qinke lake green development demonstration creation area' by a research team of the development and research center of the state academy of health, a green ecological agriculture planting mode of the duck frog rice is explored, after the practical exploration in 2016 and 2019, under the basic premise that no pesticide and no fertilizer are applied in the whole process, the green prevention and control integration technology standard of the duck frog rice is established and formed, and 8 green prevention and control integration technologies of the duck frog rice covered in the whole area are that ① green fertilizers, namely astragalus sinicus, ② electrolyzed water is used for disinfection treatment of seed nutrition soil seedling trays, ③ greenhouse matrix is used for centralized seedling raising, machine transplanting, ④ timely turning over, drying, retting green fertilizers and rice roots, ⑤ lamps, ⑥ sex inducement, ⑦ paddy fields are used for breeding ducks, ⑧ biological organic fertilizers are applied.

Through the practical summary of 2016-plus 2018, the invention realizes the whole-course weed green prevention and control technical scheme of 'controlling grass by green manure, inhibiting grass by water and weeding by ducks' of the duck frog rice.

The specific application examples are as follows:

example 1

Under the cultivation mode of the duck frog and the rice, the technical scheme of green weed prevention and control includes green manure weed control, deep water weed suppression and rice and duck weed control.

The route of the technical scheme is as follows: planting green manure milk vetch in autumn and winter, ploughing when the biomass of milk vetch is maximum near flowering, dry ploughing without water, dry-drying for 7-10 days, retting for 3-5 days, transplanting rice seedlings by a land preparation machine, and irrigating for 7-10 cm; 15 days after transplanting, 15 rice ducks of 15 days old and 15 Dongting sheldrake ducks are put into each mu, and then a proper amount of ducks are put into the area with high weed density according to the weed occurrence condition in the field, so that the problem of impurity damage can be solved.

The key technical points of the technical scheme are as follows: the method comprises the following steps of occupying field ecological niches with green manure, inhibiting weed living space, dry ploughing, drying and sunning, and inhibiting weed seeds and tuber germination by using high-temperature and high-concentration green manure fermentation liquor generated by fermentation of the green manure; secondly, dry ploughing, drying in the sun, fermenting by green manure to generate high temperature so as to lead partial weed seeds to germinate in advance, then irrigating, retting and soaking, and mechanically preparing land to kill weeds; thirdly, irrigating 7-10 cm of deep water after transplanting rice seedlings to inhibit the growth speed of weeds, and providing possibility for solving the weeds when rice and ducks are planted in the field after 15 days. Fourthly, the rice and the duck eat the weed seeds and tubers on the ground surface, eat the small grass, and pedal to die the small grass during sports.

In practice, the green manure grows weakly, the illumination is low in the plowing and dry-sunning period, the temperature is low, the weed generation is obviously increased, the rice and ducks are late in field, the grass age is large, and the rice and ducks cannot solve the grass problem.

Example 2

After the duck frog rice field is transplanted with rice seedlings in a winter-fallow field and before rice ducks are planted in the field, the weed occurrence amount is compared

In 2019, the duck frog rice field in Changan village in Shihou city and an adjacent winter fallow field are investigated, and the rice variety, Tianliangyou 616, the duck frog rice is planted in the rice field in 15 months, the rice field is mechanically transplanted in 12 days in 4 months, compared with the rice field planted in the winter fallow field by farmers, the rice field is manually transplanted in 17 days in 4 months. Survey sampling area 0.25cm²The results are shown in Table 1.

TABLE 1 Duck frog paddy field and winter fallow field weed occurrence comparison questionnaire (5 month 10 days)

And (4) conclusion: the amount of barnyard grass is reduced by nearly 100% 28 days after the seedlings of the duck frog rice are transplanted in green fertile field and 23 days after the seedlings are transplanted in idle field. The reduction of the sparganium stoloniferum is 99.7 percent, the reduction of the broadleaf grass is 52.8 percent, and the total grass is reduced by 97.5 percent. And (3) concluding that green manure is planted, ploughing is carried out timely, drying is carried out, retting is carried out, mechanical land preparation is carried out, a water layer with the thickness of about 7 cm is irrigated after seedling transplantation, grass basically does not grow in nearly 1 month, and compared with a vacant field in winter, the amount of monocotyledonous weeds is reduced by more than 99%, and the amount of dicotyledonous weeds is reduced by 52.8%.

Example 3

Solving the later weeds of rice and duck

The weeding observation of the stone 2016-shaped rice and duck in 2019 shows that:

1. 15 rice ducks 15 days old are thrown into each mu after 15 days of rice transplanting, deep water of 7 cm is kept in the field for a long time, and all weeds are below a water layer, so that the rice ducks can solve all the weeds.

2. The rice and duck is late in field, barnyard grass is higher than a water layer, and the rice and duck cannot solve the barnyard grass, but can solve broadleaf weeds and nutgrass flatsedge.

3. The field is not leveled, the land blocks protruding out of the water surface cannot be removed, and the weeds are generated more. The rice and duck prefer to swallow the impurities floating on the water surface and the weeds below the water layer.

Example 4

Comparison of the weeds in the Duck frog regenerated rice field with the weeds in the conventional middle rice field

7, 22 days in 7 months, the first season of the regenerated rice is in the stage of homogeneous heading and filling, and the occurrence conditions of weeds are compared after 'one-sealing two-killing three-supplement' at the final tillering stage of conventional mid-season rice.

TABLE 2 questionnaire of weed occurrence (7 month and 22 days survey)

Compared with the conventional medium-rice weed 'one-sealing two-killing three-nourishing' field block, the field block for the duck frog regeneration rice field has the advantages that the monocotyledon weeds are reduced by 65.6 percent, the dicotyledon weeds are reduced by 100 percent, and the total number of the single weeds and the double weeds is reduced by 92.1 percent.

Example 5

The occurrence conditions of the duck frog regenerated rice field and the conventional rice planthopper for preventing the rice sheath blight disease are compared

The test was conducted in the Baizi fomentata and the Zhenzhoutang village base in 2019, 3 fields were selected, 5 samples were taken from each field, the number of roots (plants) of striolation disease and the number of rice planthopper were investigated at different times, and the root (plant) rate was calculated.

A duck frog reproduced rice Feng Liang you Xiang I (Baizi Zanyang Song rice planting professional cooperatives) with an area of 10 mu; 1128 (chemical control area of Gaoyou Zhenzhen Ganzhen) of Guangliangyou in one season, 3 mu in area.

Sheath blight was investigated 3 times on days 11, 1 and 22 at 6, 7 and 7 months, respectively, and the results are shown in FIG. 3. Graph showing the change in the rate of rhizoctonia solani plants.

The number of the rice planthoppers was investigated 6 times in total in 6 months and 10 days, 7 months and 1 day, 7 months and 10 days, 7 months and 22 days, 8 months and 5 days and 8 months and 28 days, respectively, and the results are shown in a dynamic graph of the number of the rice planthoppers in two places in FIG. 4.

And in 22 days after 7 months, the peak of the banded sclerotial blight occurs, the rate of Duck frog rice disease stump is 20%, the rate of contrast field is 42%, the reduction amount is 52.4%, the rate of Duck frog rice disease plants is 9.31%, the rate of contrast field is 22.1%, and the reduction amount is 57.9%. The total quantity of the rice planthopper is accumulated 6 times from 10 days in 6 months to 28 days in 8 months, the reduction amount of the duck frog rice is 93.6 percent compared with that of the duck frog rice in 780 heads, the comparison field 12150 is reduced, the maximum quantity of the rice planthopper is 270 heads compared with that of the duck frog rice in 10000 heads, and the reduction amount of the rice planthopper is 97.3 percent compared with that of the duck frog rice in 10000 heads.

Compared with the conventional field prevention, the rate of the root of the striga blight disease is reduced by 52.4% and the rate of the diseased plant is reduced by 57.9% due to green prevention and control integrated technologies such as planting green manure, applying organic fertilizer, breeding ducks in rice field and not applying chemical fertilizer. The accumulated quantity of the rice planthopper is reduced by 93.6 percent, and the maximum quantity of the rice planthopper is reduced by 97.3 percent. The duck frog rice can well prevent and control sheath blight and rice planthopper, reduces the use of chemical pesticides, is favorable for delaying the generation of drug resistance of pests, and better protects the ecological environment.

Example 6

The occurrence of the rice-stem borer in the duck frog regenerated rice field is compared with that in the conventional rice field

The method is carried out in northern village (duck frog rice field) and Gaozhi Baozhen (conventional rice field) in Shishou city mud in 2019.

The method comprises the steps of planting the Jinsu rice in the specialized cooperative society base of the Jincun Jingsu rice planting in Shishou, the Shishou, China-Youkou, the Fuguanyou 822 rice variety, the Fuguanyou rice variety, the mechanical sowing in the Fuguan, the area of 600 mu, the use of a green prevention and control technology, the sexual attraction of 500 sets, the release of 500 thousands of the Chilo.

Shishou gaozhi baozhen (conventional rice field): the rice variety is soaked in the soil 17 morning in the morning in 3 months and 20 days, the rice is raised in a small arched shed seedling throwing disc, the rice is thrown in 16 days in 4 months, and about 12 days in 5 months, 10 milliliters of 20 percent chlorantraniliprole suspending agent is applied to each mu.

The Chilo suppressalis Bai-stifle sheath withering of the first generation rice borers is carried out in the Mitsuoku rice planting professional cooperative society of Mucun Jingsu at 6 months and 18 days, and the sheath withering number of the single sheath withering group is investigated and compared with the Zhenzhitang investigation (investigation result at 6 months and 10 days).

TABLE 3 comparison of Duck frog rice field with conventional first generation Chilo suppressalis damage

The results in table 3 show that the relative prevention effect of the rana nigawa rice planting area (1 st year) on the hundreds of rhizoctonia solani sheaths of the first generation chilo suppressalis is 95%, the number of the rhizoctonia solani sheaths of a single coleoptile group is reduced by 84.7%, and the effect of controlling the chilo suppressalis is obvious.

In the pure single-season rice planting area, the generation program of the chilo suppressalis is lower than that in the mixed planting area of the early, middle and late seasons, four technical measures of sexual trichogramma induction, duck breeding in the rice field and application of bio-organic fertilizer are matched, and the harm of the chilo suppressalis of the first generation can be completely controlled.

The present invention will be further described with reference to effects.

The whole-course green prevention and control technology of the paddy rice in Shishou city in Hubei province, green manure, machine tillage, proper water layer and rice duck, the technology of controlling grass by green manure, inhibiting grass by water and weeding by duck can effectively solve the whole-course weed, the generation amount of monocotyledon weeds can be reduced by 99.7% in the early period, the generation amount of dicotyledon weeds can be reduced by 52.8%, compared with the conventional pesticide application of middle-season paddy rice in the later period, after the chemical weeding of 'one-sealing two-killing three-tonifying' is carried out, the monocotyledon weeds are reduced by 65.6%, the dicotyledon weeds are reduced by 100%, and the single-double.

The green manure is used for controlling weeds, the water is used for inhibiting the weeds, and the ducks are used for weeding, and the green manure is matched with the green manure, the water is used for inhibiting the weeds, the organic combination is realized, namely, the growth amount of the green manure is large, the green manure is ploughed and dried fully, the retting, the fermentation is good, the field preparation is careful, the growth speed of the weeds is inhibited by the water-retaining layer after the seedlings are transplanted, the weeds are below the water layer when the rice and ducks are planted in the field, the rice and ducks are planted in the field.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A method for producing rice by using duck frogs to prevent diseases, insects and control grasses and lose weight is characterized by comprising the following steps of:

thirdly, feeding ducks 15 days after transplanting rice seedlings, and feeding the ducks for eating according to the density of weeds in the field;

2. The method for producing rice by using the duck frog to prevent diseases, insects, control grasses and lose weight as claimed in claim 1, wherein the step one specifically comprises: planting green manure milk vetch every 667m in autumn and winter²The seed consumption is 1.75kg, and rhizobium is inoculated before sowing.

3. The method for producing rice by using the duck frog to prevent diseases, pests, control grasses and lose weight as claimed in claim 1, wherein the second step comprises: in the next year, the biomass reaches the maximum in the full-bloom stage of the milk vetch, and the water-free dry ploughing, pressure-turning, dry-drying for 7-10 days, retting for 3-5 days, transplanting by a soil preparation machine, and irrigating7 cm-10 cm; combined soil preparation every 667m²Applying organic fertilizer for 1-2 t or decomposed cake fertilizer for 0.5 t.

4. The method for producing rice by using the duck frog to prevent diseases, pests, control grasses and lose weight as claimed in claim 1, wherein the second step comprises: applying additional fertilizer every 667m in tillering stage and ear stage²And (3) applying 0.1t-0.2t of decomposed cake fertilizer, and ploughing when the biomass of the milk vetch is maximum near flowering.

5. The method for producing rice by using the duck frogs for disease prevention, insect control and grass control and weight reduction as claimed in claim 1, wherein in the third step, ducks are thrown, and 15-day-old rice ducks are thrown per mu after 15 days of seedling transplantation; and then, according to the weed occurrence condition in the field, feeding a proper amount of duck to the area with high weed occurrence density.

6. The method for producing rice by using the duck frog to prevent diseases, pests, control grasses and lose weight as claimed in claim 1, wherein in the fourth step, every 667m²60-80 frogs of about 50g are thrown in; the frog can return to nature without recovery.