CN1309886A - Rice blast controlling techn utilizing genetic diversity of rice - Google Patents
Rice blast controlling techn utilizing genetic diversity of rice Download PDFInfo
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Abstract
The rice blast controlling technology is to intercrop one raw of high-stem high-quality rice for every 4-8 rows of short stem hybrid rice, with the high stem variety being over 20 cm higher than the short stem one and having genetic difference or RGA fingerprint difference of over 10 % and maturation period difference of over 40 days. The said technology can control rice blast effectively, reduce the amount of applied farm chemical, increase the disease resistance, lodging resistance and yield of rice obviously.
Description
The invention belongs to the rice cultivating technique field.
For a long time, in order to satisfy human grain demand, the countries in the world Rice Production has to pursue the fecund target of high yield again, and each rice district has successively taked high yielding variety establishing in large scale and other supplementary measures.But the establishing in large scale and the excessive of agriculture chemical of long-term single variety are used, make that rice district farmland production system is simple day by day and fragile, Agro-ecology worsens, and crop pest takes place frequent on the one hand, differentiation of pathogen fungus strain and growth and decline thereof are quickened, and cause further growing and spreading of rice blast; On the other hand, some traditional old kinds of paddy rice high-quality because yield poorly, disease resistance is degenerated and be eliminated gradually, wasted a large amount of rice varieties genetic resourceses, and made the traditional water rice varieties that these are best in quality, economic worth is high endangered.Rice blast is the main disease of global paddy rice, for a long time, control rice blast mainly relies on seed selection to promote disease-resistant breeding, rationally use measures such as chemical pesticide, fertilizer and implementation health care cultivation, and a large amount of applying pesticides have not only increased the Rice Production cost, and pollute and the destruction farmland ecological environment, even to those best in quality and not disease-resistant traditional superior rice kind applying pesticides, also be difficult to control the serious harm of rice blast, this has seriously hindered the production of paddy rice and has restricted sustainable development of agriculture.Though someone predicts that the genetic diversity of rice varieties may be to solve a kind of method that the monoculture paddy rice is subject to the disease infringement, nobody knows rule wherein, does not have the large-area applications successful examples so far.
Purpose of the present invention is exactly to provide a kind of ecological method of utilizing in order to solve the medium-term and long-term unsolved problem of above-mentioned agricultural production, promptly utilize the genetic diversity of paddy rice, in establishing in large scale by applying pesticides just can prevent and treat rice blast effectively, improve paddy rice lodging tolerance, reach and produce more food and keep high-quality heredity kind due to illness evil and the technology of being eliminated.
The objective of the invention is to be achieved through the following technical solutions.
Control rice blast technology of the present invention, be to plant 1 capable high bar fine quality paddy rice every 4～8 row the hybrid rice Tanaka of short-stalked variety more, high bar fine quality is higher more than 20 centimetres than short-stalked variety, the hereditary difference of cover two kinds of planting be RGA fingerprint difference more than 10%, the maturing stage differed in 40 days.
The clump of the high bar fine quality of being planted is apart from being 20～40 centimetres, and every clump 4～6 seedling is planted 1500～2000 clumps between every mu.
In order to make the better effects if of control rice blast, the RGA fingerprint difference of two kinds that cover is planted is preferably 20～30%; It is high more than 30 centimetres that the high bar fine quality paddy rice that cover is planted cans be compared to short-stalked variety most; The maturing stage of the two kind paddy rice that cover is planted preferably is no more than 10 days.
To overlap the long-stalked variety of planting be traditional grain quality rice kind such as fragrant rice, glutinous rice, soft rice etc.
By molecular labeling to the Pyricularia oryzae grade of fit analysis learn that the Pyricularia oryzae bacterial strain will become dominant group under field conditions (factors), except pathogenicity is undergone mutation, also to remarkable advantages be arranged to adapt to new disease-resistant gene producing on the spore ability.
The present invention utilizes the spore method for catching to finish and plants the rice blast spore Diffusion Law research of planting the field piece between glutinous rice field piece and mixing only, the result shows, only plant spore diffusion length unlimited diffusion of glutinous rice (susceptible) product farming piece with the morbidity of kind plant, the spore diffusion velocity is 5-8 a times of companion planting field piece, and the spore density of diffusion is 8-20 a times of companion planting field piece.The rice blast spore is subjected to the steric restriction of different resistances of plant and differing heights in the piece of companion planting field, and diffusion length is shorter, and diffusion velocity is slower, and especially spore density sharply descends with the prolongation of diffusion length.Result of the test shows that also the spore density of the diffusion length of magnaporthe grisea spore, diffusion velocity and diffusion and the incidence of disease of disease and severity are proportionate.
Utilize Rep-PCR molecular fingerprint technology, by different year fixed point from same field piece plant the sub-district only and the Pyricularia oryzae standard specimen is gathered in the companion planting sub-district, carried out the population genetic structural research of bacterial strain.Only the germ heredity clansmen group who plants the rice variety sub-district is comparatively single, and 1-3 clansmen group generally arranged, and has remarkable advantages clansmen group to exist; Only the germ clansmen group who plants the glutinous rice variety sub-district plants the many of rice variety more only, is generally 3-6 clansmen group, and does not have remarkable advantages clansmen group.The result shows that also the germ clansmen group of rice variety is different with the germ clansmen group of glutinous rice variety, exist obvious genetic difference, and the germ in the piece of companion planting field has the germ clansmen group of each kind concurrently.
Studies show that in different genetic resemblance levels, bacterial strain heredity parent ancestor group has certain correlation with its host's kind, geographical distribution.
The present invention utilize " germ molecular fingerprint technology " (Rep-PCR) and " kind disease-resistant gene analytical technology " (RGA) done big quantitative analysis and checking work, drawn the rule of planting between the paddy rice mixing described in the technical scheme, this rule is embodied in the field, be exactly according to rice varieties resistance and various places peasant household planting habit, the kind of selecting genetic background to differ greatly is overlapped companion planting between carrying out, grain quality rice such as glutinous rice, fragrant rice, the contour bar kind of soft rice are planted kind for cover, and short bar hybrid rice is a main breed.
Different Pyricularia oryzaes infects the paddy rice of different cultivars, in the farmland of monoculture, the genetic background of rice varieties is more single, and certain pathogenic epiphyte that can infect paddy rice might ad infinitum spread down on the farm, and the advantageous effect of rice blast is grown easily and spread; And in the farm environment of mixed culture, the propagation of germ and infecting is suppressed, and can limit the development of pathogene in the paddy rice of same farmland plantation different cultivars, thus the restriction transmission of disease.Learn that different companion plantings combinations have different control efficiency and production-increasing function to rice blast through various experimental verifications, big more kinds of economical character difference such as paddy rice resistant gene, genetic background and plant height especially, the companion planting effect is good more.Only be the resistant gene difference, other proterties are similar and kind companion planting that hereditary difference is little, and effect is relatively poor.Adopt short bar hybrid rice and high bar fine quality mixing capsule to plant, formed three-dimensional plant group, can make full use of the light and heat condition of nature, and the output of a high bar fine quality that the cover companion planting is entered is exactly the units increased in production of paddy rice.
By being observed, learns the field onset environment of companion planting field piece, the daily mean temperature of companion planting field piece is higher about 0.47 ℃ than planting the field piece only, per day relative moisture is than planting field piece low about 3.59% only, per day intensity of illumination is planted about high 3469 luxs of field piece than only, plant leaf dewdrop area coverage is lower by about 50.2% than planting the field piece only, and plant leaf dewdrop mean residence time prolongs about 46 minutes than companion planting field piece.All these shows, companion planting field piece prevents that the environment that Pyricularia oryzae spreads is more much better than planting the field piece only.
Planting test through the large tracts of land kind shows, the companion planting of many kinds of paddy rice helps the growth of paddy rice and is unfavorable for growing of disease, the road that grows and spread of the fine rice blast that broken of companion planting technology, the rice blast disease index obviously descends, reduced applications of pesticide amount, the diseases prevention of paddy rice, disease-resistant, lodging tolerance are strengthened greatly, and rice yield also is significantly improved.
Technology of the present invention has strengthened the ecologic stability in rice field, can control the popular of rice blast effectively, no longer needs basically to spray the agricultural chemicals that prevents rice blast to the rice field, improves the ecological condition of harmony between man and nature development.As long as the plantation of reasonable implementation variety diversity is reasonably arranged in pairs or groups the companion planting kind by rule, not only can produce remarkable economic efficiency, social benefit and ecological benefits, and can effectively utilize and preserve local fine quality resource and genetic resources.Technical method of the present invention is simple, practical, meets peasant household's planting habit, is easy to be wide farmers study and acceptance.
Below, further set forth the present invention in conjunction with the accompanying drawings and embodiments.
Figure 1 shows that the schematic diagram of companion planting.
At first carrying out breed combination selects, according to Rice Genetic background, economical character and economic characters, requiring the apolegamy standard of various places is that local high-yield hybrid rice varieties is main breed, take grain quality rice such as fragrant rice, glutinous rice, the local old kind of the contour bar of soft rice as between plant kind, hereditary difference is more preferably greater than 20% between two kinds, it is higher more than 30 centimetres than main breed to plant kind between the plant height potential difference, is no more than around the breeding time about 10 days and is advisable. If it is inconsistent to plant in the combination kind maturity period between mixing, can regulate by the sowing seedling phase. If the combination kind maturity period differed 10 days, late variety sowing seedling in 10 days in advance gets final product. The selection of kind will be suited measures to local conditions with combination. The nursery period management is implemented by local farming operation sequence. As shown in Figure 1, bar cultivation mode by present hybrid paddy rice is cultivated short-stalked variety hybrid paddy rice A, the spacing in the rows of hybrid paddy rice, line-spacing and density are all identical with conventional method, the line-spacing L1 of short-stalked variety hybrid paddy rice A is 15 centimetres, this is 15 centimetres two behaviors, one elementary cell apart, distance L 2 between two whenever adjacent elementary cells is 30 centimetres, plant the high bar fine quality of 1 row paddy rice glutinous rice B hybrid paddy rice Tanaka every 4 row more, the clump of glutinous rice is about 35 centimetres apart from H, every clump of 4～6 seedlings are planted 1500～2000 clumps between every mu. But plant between synchronized mixes when planting, also can after hybrid paddy rice be transplanted 3-5 days, mend inner room and plant glutinous rice.
Embodiment: 2000 in the Jianshui County, Yunnan the examination of each small towns plant 50174 mu of areas, according to local conditions, the master who selects plants that the hybrid rice kind mainly contains that Shanyou 63, silk are excellent 63, special excellent 63, II is excellent 63, Shan is excellent 22, No. one, the excellent polyphyly of Shan etc., plants that kind is mainly glutinous based on yellow shell, purple is glutinous, Yuanjiang River is glutinous, pine nut is glutinous, fragrant paddy etc.Between plant mode between the capable hybrid rice of 4-6 is many, planting delegation's glutinous rice, hybrid rice is planted density and local custom high yield consistent in density, the glutinous rice clump is planted, every clump of 4-5 seedling, clump is planted the 1500-2000 clump and is advisable apart from being 30-40 centimetre between every mu.The record of companion planting rice varieties sees Table one, and companion planting technology application effect sees Table two, and the companion planting field demonstration is promoted the different densities economical character and output sees Table three.
Table one:
Kind record table transplants rice seedlings between 2000 Jianshui County rice varieties diversity are mixed
Table two:
| Numbering | Variety name | Type | The plantation time limit (year) | Cultivated area (mu) | Plantation reflection (R/S) | Breeding time (my god) | Plant height (CM) | Thousand kernel weight (gram) | Grain number per spike (grain) | Theoretical yield kilogram/mu | Genetic background |
| 1 | Silk excellent 63 | Indica type | ????4 | ?20000 | ????R | About 170 days | ?80-100 | ?25-27 | ???130-160 | ?550-680 | Good quality male sterile line silk seedling A/ bright extensive 63 |
| 2 | Shanyou 63 | Indica type | ????16 | ?15000 | ????R | ?????165-175 | ?901-10 | ?26-27 | ???120-150 | ?600-700 | Precious Shan A/ bright extensive 63 |
| 3 | Special excellent 63 | Indica type | ????3 | ?10000 | ????R | ?????170-180 | ?100-115 | ?26-28 | ???130-150 | ?600-700 | Long Tepu A/ bright extensive 63 |
| 4 | No. 1, the excellent polyphyly of Shan | Indica type | ????6 | ?5000 | ????R | ?????160-170 | ?100-110 | ?26-27 | ???130-140 | ?500-600 | Bright extensive 63/Tetep//bright extensive 63/ // bright extensive 63 |
| 5 | II excellent 501 | Indica type | ????7 | ?2000 | ????R | ?????170-180 | ?100-110 | ?27-28 | ???150-170 | ?600-700 | II-32-8A/ continuous extensive 501 |
| 6 | Yellow shell is glutinous | The round-grained rice type | More than 30 years | ????S | ?????160-180 | ?130-160 | ?25-27 | ???140-160 | ?200-400 | ||
| 7 | Purple glutinous | Indica type | More than 20 years | ????S | ?????160-170 | ?130-150 | ?24-27 | ???100-140 | ?300-400 | ||
| 8 | White shell is glutinous | The stalk type | More than 30 years | ????S | ?????170-190 | ?140-170 | ?23-26 | ???120-160 | ?200-300 | ||
| 9 | Rein in Bai Xianggu | The stalk type | More than 30 years | ????S | ?????140-150 | ?120-140 | ?23-25 | ???110-130 | ?200-300 | ||
| 10 | Yuanjiang River is glutinous | The round-grained rice type | More than 20 years | ????S | ?????160-170 | ?130-150 | ?24-26 | ???110-120 | ?200-400 | ||
| 1?1 | Pine nut is glutinous | The round-grained rice type | More than 30 years | ????S | ?????140-150 | ?120-140 | ?23-25 | ???100-120 | ?250-300 |
The technology of planting was applied the statistical effect table between Jianshui County rice varieties diversity was mixed in 2000
Annotate: the glutinous paddy of per kilogram is by 2 yuan: pesticide dosage mainly refers to anti-rice blast dosage.
Table three:
Plant field demonstration between Jianshui County rice varieties diversity was mixed in 2000 and promote different densities economical character and output application form
Table three (continuing):
| The place | The householder | Planting Patterns | Kind | Lodging resistance | The Other Main Agronomic Characters performance | Output (kg/ mu) | Plant density (ten thousand clumps/mu) | Remarks | |||||
| Plant height (cm) | Mu is fringe (ten thousand) effectively | The real grain of every fringe | The empty grain of every fringe | Sterile grain rate (%) | Thousand kernel weight (g) | ||||||||
| Battalion of the white family of Xi Zhuan | Yang Shihua | Companion planting R: S=4: 1 | Silk excellent 63 | Directly | 96.4 | ?20.87 | ?124.6 | ?17.2 | ?12.13 | ?26.5 | ?689.1 | ?1.480 | Lodging resistance with " directly " " tiltedly " " fall " " volt " represent R: S=4: 1 expression is planted the high bar fine quality of delegation every 4 row short-stalked varietys covers |
| Purple glutinous | Tiltedly | 152.3 | ?1.46 | ?136.9 | ?11.6 | ?7.81 | ?25.8 | ?51.6 | ?0.182 | ||||
| Xi Zhuan Xie Jia gulf | Luo Xinggui | Companion planting R: S=4: 1 | Shanyou 63 | Directly | 94.8 | ?21.32 | ?1293 | ?25.7 | ?16.58 | ?25.9 | ?713.98 | ?1.542 | |
| Yellow shell is glutinous | Directly | 146.2 | ?1.49 | ?14.2 | ?10.4 | ?6.86 | ?26.7 | ?56.2 | ?0.173 | ||||
| West village Ma Fang | Mao Zengyan | Companion planting R: S=4: 1 | Shanyou 63 | Directly | 98.6 | ?19.76 | ?130.4 | ?20.8 | ?13.76 | ?26.9 | ?693.1 | ?1.425 | |
| Yellow shell is glutinous | Directly | 140.3 | ?1.68 | ?148.6 | ?14.2 | ?8.72 | ?26.4 | ?65.9 | ?0.187 | ||||
| Xi Zhuan Xie Jia gulf | Wang Maoyou | Companion planting R: S=4: 1 | Silk excellent 63 | Directly | 97.4 | ?22.36 | ?118.8 | ?33.6 | ?22.05 | ?26.8 | ?711.9 | ?1.644 | |
| Yellow shell is glutinous | Directly | 136.8 | ?1.84 | ?130.8 | ?14.5 | ?9.98 | ?26.7 | ?64.3 | ?0.188 | ||||
| West village Ma Fang | Shen Qiping | Companion planting R: S=4: 1 | Special excellent 63 | Directly | 110.4 | ?18.96 | ?128.7 | ?16.4 | ?11.30 | ?26.9 | ?656.4 | ?1.436 | |
| Purple glutinous | Directly | 148.6 | ?1.98 | ?139.5 | ?8.7 | ?5.87 | ?26.4 | ?72.9 | ?0.212 | ||||
| Dong Shanba | Zhou Jiaming | Companion planting R: S=4: 1 | Ridge excellent 22 | Directly | 105.7 | ?19.34 | ?120.6 | ?21.8 | ?15.31 | ?26.2 | ?611.1 | ?1.526 | |
| Yellow shell is glutinous | Directly | 139.2 | ?1.86 | ?131.4 | ?16.1 | ?10.92 | ?26.1 | ?63.8 | ?0.138 | ||||
| Dong Shanba | Li Hualong | Companion planting R: S=4: 1 | Silk excellent 63 | Directly | 102.9 | ?18.83 | ?126.5 | ?24.9 | ?16.45 | ?26.4 | ?628.8 | ?1.582 | |
| White shell is glutinous | Directly | 140.5 | ?1.45 | ?137.2 | ?16.7 | ?11.22 | ?26.8 | ?43.3 | ?0.122 | ||||
Plant field demonstration between Jianshui County rice varieties diversity was mixed in 2000 and promote different densities economical character and output application form
Table three (continuing):
| The place | The householder | Planting Patterns | Kind | Lodging resistance | The Other Main Agronomic Characters performance | Output (kg/ mu) | Plant density (ten thousand clumps/mu) | Remarks | |||||
| Plant height (cm) | Mu is fringe (ten thousand) effectively | The real grain of every fringe | The empty grain of every fringe | Sterile grain rate (%) | Thousand kernel weight (g) | ||||||||
| The face pasture | Yan Ziyu | Companion planting R: S=4: 1 | Silk excellent 63 | Directly | 93.4 | ?20.12 | ?112.9 | ?19.7 | ?14.86 | ?26.3 | ?597.4 | ?1.488 | Lodging resistance with " directly " " tiltedly " " fall " " volt " represent R: S=4: 1 expression is planted the high bar fine quality of delegation every 4 row short-stalked varietys covers |
| Yellow shell is glutinous | Tiltedly | 153.8 | ?1.27 | ?124.7 | ?20.6 | ?14.18 | ?25.8 | ?40.9 | ?0.153 | ||||
| The face pasture | Wang Xiumei | Companion planting R: S=6: 1 | Shanyou 63 | Directly | 102.7 | ?22.34 | ?117.8 | ?15.4 | ?11.56 | ?24.7 | ?650.0 | ?1.567 | |
| Yellow shell is glutinous | Tiltedly | 148.3 | ?0.98 | ?134.9 | ?33.5 | ?19.89 | ?25.6 | ?33.8 | ?0.085 | ||||
| The face pasture | Liu Guoxing | Companion planting R: S=6: 1 | Special excellent 63 | Directly | 105.6 | ?21.08 | ?120.3 | ?26.2 | ?17.88 | ?26.7 | ?667.1 | ?1.524 | |
| Yellow shell is glutinous | Tiltedly | 149.5 | ?1.09 | ?138.4 | ?17.8 | ?11.40 | ?26.5 | ?39.98 | 0.078 | ||||
| The face pasture | Liu Chaoyi | Companion planting R: S=6: 1 | Shanyou 63 | Directly | 98.8 | ?20.85 | ?130.6 | ?32.3 | ?19.83 | ?25.9 | ?705.3 | ?1.456 | |
| Yellow shell is glutinous | Directly | 140.4 | ?1.32 | ?136.5 | ?13.8 | ?9.18 | ?26.1 | ?47.0 | ?0.098 | ||||
| The face pasture | Xu Wansheng | Companion planting R: S=6: 1 | Silk excellent 63 | Directly | 96.5 | ?21.88 | ?126.4 | ?14.6 | ?10.35 | ?26.2 | ?724.6 | ?1.540 | |
| Yellow shell is glutinous | Directly | 142.6 | ?1.42 | ?137.1 | ?30.7 | ?18.30 | ?26.5 | ?51.6 | ?0.089 | ||||
| The Qujiang River | Zhou Jiaxiang | Companion planting R: S=4: 1 | Special excellent 63 | Directly | 113.5 | ?22.06 | ?118.3 | ?26.1 | ?18.07 | ?25.4 | ?662.9 | ?1.762 | |
| White shell is glutinous | Directly | 152.6 | ?1.36 | ?130.4 | ?18.4 | ?12.37 | ?26.1 | ?46.3 | ?0.144 | ||||
| The Qujiang River | Qian Yanmei | Companion planting R: S=4: 1 | II excellent 63 | Directly | 108.1 | ?21.84 | ?121.2 | ?29.9 | ?19.79 | ?26.4 | ?698.8 | ?1.638 | |
| Yellow shell is glutinous | Directly | 149.2 | ?1.46 | ?136.5 | ?27.6 | ?16.82 | ?26.3 | ?52.4 | ?0.162 | ||||
Plant field demonstration between Jianshui County rice varieties diversity was mixed in 2000 and promote different densities economical character and output application form
| The place | The householder | Planting Patterns | Kind | Lodging resistance | The Other Main Agronomic Characters performance | Output (kg/ mu) | Plant density (ten thousand clumps/mu) | Remarks | |||||
| Plant height (cm) | Mu is fringe (ten thousand) effectively | The real grain of every fringe | The empty grain of every fringe | Sterile grain rate (%) | Thousand kernel weight (g) | ||||||||
| The Chen Guan town | Li Jingsong | Companion planting R: S=4: 1 | II excellent 63 | Directly | 110.3 | ?182.0 | ?129.2 | ?18.8 | ?12.70 | ?26.8 | ?630.2 | ?1.421 | Lodging resistance with " directly " " tiltedly " " fall " " volt " represent R: S=4: 1 expression is planted the high bar fine quality of delegation every 4 row short-stalked varietys covers |
| Yellow shell is glutinous | Directly | 152.7 | ?1.43 | ?132.0 | ?27.0 | ?16.90 | ?26.6 | ?50.2 | ?0.163 | ||||
| The Chen Guan town | Xu Zhenglong | Companion planting R: S=4: 1 | Shanyou 63 | Directly | 99.8 | ?22.88 | ?118.6 | ?24.8 | ?17.29 | ?26.4 | ?716.4 | ?1.684 | |
| Yellow shell is glutinous | Directly | 145.6 | ?1.85 | ?135.1 | ?29.7 | ?18.02 | ?25.8 | ?64.5 | ?0.125 | ||||
| The Dong Ba town | Wang Yan | Companion planting R: S=4: 1 | Special excellent 63 | Directly | 110.7 | ?20.64 | ?123.7 | ?26.8 | ?17.81 | ?26.3 | ?671.5 | ?1.460 | |
| Yellow shell is glutinous | Directly | 156.3 | ?1.62 | ?135.4 | ?18.9 | ?12.25 | ?25.6 | ?56.2 | ?0.182 | ||||
| The Dong Ba town | Li Zhiming | Companion planting R: S=4: 1 | Silk excellent 63 | Directly | 103.4 | ?19.78 | ?128.3 | ?25.5 | ?16.58 | ?26.7 | ?677.6 | ?1.636 | |
| Yellow shell is glutinous | Directly | 148.9 | ?2.02 | ?132.5 | ?19.4 | ?12.77 | ?25.8 | ?69.1 | ?0.167 | ||||
| The Nan Zhuan town | Chen Zhi | Companion planting R: S=4: 1 | Shanyou 63 | Directly | 98.6 | ?20.56 | ?121.2 | ?30.5 | ?20.11 | ?25.9 | ?645.4 | ?1.582 | |
| Yellow shell is glutinous | Directly | 138.8 | ?1.48 | ?131.6 | ?29.1 | ?18.10 | ?26.2 | ?41.6 | ?0.148 | ||||
| The Nan Zhuan town | Lin Chongwei | Companion planting R: S=4: 1 | Silk excellent 63 | Directly | 96.5 | ?19.67 | ?129.8 | ?22.3 | ?14.66 | ?26.4 | ?674.0 | ?1.539 | |
| White shell is glutinous | Directly | 134.2 | ?1.64 | ?128.5 | ?30.6 | ?19.23 | ?24.9 | ?52.5 | ?0.146 | ||||
Survey the product result according to above-mentioned test multiple spot, 50.6 kilograms of glutinous rices of average mu volume increase, this project is only promoted in the whole county just can increase production 253.88 ten thousand kilograms in glutinous paddy, amounts to 507.8 ten thousand yuan of new output values (the glutinous paddy of per kilogram is by 2.00 yuan of calculating), has obtained tangible economic benefit.Simultaneously, cultivation method is simple, and the throwing worker is few, and it is few to spend, and disease-resistant yield-increasing is profitable, meets the peasant planting custom.
Field large-area applications result of the present invention is as follows:
Carrying out 43000 hectares of rice varieties diversity in 56 points for investigation in 40 counties, Yunnan Province in 2000 plants between mixing and prevents the test of rice blast large tracts of land, the result shows, plant between the rice varieties diversity is mixed rice blast is had very obvious control effect, especially outstanding is, the incidence of disease of companion planting grain quality rice kind leaf pest and fringe pest, disease index (or percent of loss) all descend very significantly, control efficiency between 76%～99%, to the weaving effect of main breed rice blast between 32～51%.Plant between variety diversity mixes with planting only and compare, rate 100% resistant to lodging reduces applications of pesticide amount more than 60%, plants between mixing with planting hybrid rice only and compares, and the amount of increase in production per hectare is between 610～925 kilograms.
2000 in Sichuan, provinces and cities such as Chongqing, Guizhou, Hunan, Hubei, Jiangxi, Zhejiang, Jiangsu, Guangdong and Shaanxi test, the result shows, plant kind between mixing the incidence of disease ratio of rice blast is planted kind minimizing 70～84% only, severity reduces by 38～82%, rate 100% resistant to lodging, reduce applications of pesticide amount more than 60%, per hectare increases income 550～720 kilograms of grain quality rice, has obtained and the consistent effect of Yunnan Province's small plot experiment.
Claims (6)
1, rice blast controlling techn utilizing genetic diversity of rice, the planting type that keeps present hybrid rice, the spacing in the rows of rice-cultivating, line-spacing and density are all identical with conventional method, it is characterized in that, hybrid rice Tanaka in short-stalked variety (A) plants 1 row high bar fine quality paddy rice (B) every 4～8 row more, high bar fine quality (B) is higher more than 20 centimetres than short-stalked variety (A), the hereditary difference of cover two kinds of planting be RGA fingerprint difference more than 10%, the maturing stage differed in 40 days.
2, control rice blast technology according to claim 1 is characterized in that, the clump of high bar fine quality (B) is 20～40 centimetres apart from (H), and every clump 4～6 seedling is planted 1500～2000 clumps between every mu.
3, control rice blast technology according to claim 1 is characterized in that, the RGA fingerprint difference of two kinds that cover is planted is preferably 20～30%.
4, control rice blast technology according to claim 1 is characterized in that, it is high more than 30 centimetres that the high bar fine quality paddy rice (B) that cover is planted cans be compared to short-stalked variety (A) most.
5, control rice blast technology according to claim 1 is characterized in that, the maturing stage of the two kind paddy rice that cover is planted preferably is no more than 10 days.
6, control rice blast technology according to claim 1 is characterized in that, the cover long-stalked variety of planting is traditional grain quality rice kind such as fragrant rice, glutinous rice, soft rice etc.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105265260A (en) * | 2014-07-15 | 2016-01-27 | 李晓方 | High-yield cultivation technology for rice population with stereo layered spikes |
| CN107871039A (en) * | 2017-11-06 | 2018-04-03 | 浙江工业大学 | A kind of rice spacing in the rows optimization method based on dummy model |
| CN108323388A (en) * | 2015-09-16 | 2018-07-27 | 苏建华 | Wheat planting method |
-
2001
- 2001-04-07 CN CNB011073306A patent/CN1156210C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105265260A (en) * | 2014-07-15 | 2016-01-27 | 李晓方 | High-yield cultivation technology for rice population with stereo layered spikes |
| CN108323388A (en) * | 2015-09-16 | 2018-07-27 | 苏建华 | Wheat planting method |
| CN107871039A (en) * | 2017-11-06 | 2018-04-03 | 浙江工业大学 | A kind of rice spacing in the rows optimization method based on dummy model |
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| Publication number | Publication date |
|---|---|
| CN1156210C (en) | 2004-07-07 |
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