JPS60190702A - Cultivation of tea - Google Patents

Abstract

PURPOSE:To drop old leaves carrying the eggs of vermin, to effect the breakage of dormancy of bud and the promotion of sprouting, and to increase the yield, by applying the supernatant liquid of leached lime nitrogen, etc. having a specific concentration to tea tree in winter afrer the hervest. CONSTITUTION:Supernatant liquid of leached lime nitrogen or an aqueous solution of cyanamide useful as an agricultural chemical or fertilizer and having herbicidal, fungicidal and insecticidal activities is applied at a specific concentration to tea trees in winter after hervest. The cyanamide can be synthesized by treating lime nitrogen with an acid, and has similar properties to the supernatant liquid of leached lime nitrogen. The stock solution can be prepared by dissolving 40kg of lime nitrogen in 200l of water, stirring the solution at 30-35 deg.C for 2hr, leaving to stand for 2hr, and collecting the supernatant liquid. It is applied to the tree by diluting 5-10 odd times. EFFECT:The influence of the disinfectant liquid applied to the tree and accumulated in the leave during the former cultivation season can be prevented by the fall of the old leaves. The sprouting is promoted by 1-2hr, the frost injury in April or early May can be prevented, and the picking time can be advanced.

Description

DETAILED DESCRIPTION OF THE INVENTION When the harvest season ends and winter begins, the buds formed on tea plants become dormant, and after a certain period of low temperature, they germinate into rolls and new leaves are formed. Tea is made by picking new leaves that sprout this spring, making tea, and making it available for drinking.

However, in the conventional tea cultivation method of waiting for the spontaneous dormancy of the buds to end and picking out the new leaves formed by germination, it is difficult to determine the timing of germination and formation of new leaves. Because the cycle coincides with the hatching of eggs of pests such as oil beetles and mites, new shoots that are germinating and growing are easily attacked by these pests, and the frost that falls from April to the beginning of May causes the germination to become less resistant. There is a problem that freshly sprouted shoots are easily damaged. When picking new leaves from the stones, there is a high risk that leaves that have overwintered may be mixed in with the stones, but in order to exterminate the pests and make tea, only the newly growing leaves are needed, without removing flowers or fruits, so disinfection is necessary. The solution must be sprayed frequently, so there is a high possibility that the overwintered plants will have accumulated the disinfectant sprayed during cultivation. In addition, since tea, like other fruits and vegetables, is served by pouring hot water into the pot without rinsing with water, the disinfectant that has been mixed in with the tea may have an effect on the human body. It becomes a problem.

It is an object of the present invention to provide a tea cultivation method that can solve the drawbacks of the conventional tea cultivation methods and also increase the yield. Alternatively, it is characterized by spraying an aqueous cyanamide solution on tea plants in the winter after the harvest period.

Lime nitrogen is used as a pesticide or fertilizer, and has herbicidal, bactericidal, and insecticidal effects. In addition, by treating the vines with lime nitrogen leaching supernatant,
It is known that it can interrupt the spontaneous dormancy of grape buds and promote germination. Dormancy of buds is terminated by exposure to low temperature for a certain period of time, and it is said that the lime nitrogen leached upper surface liquid has the effect of reducing the low vortex requirement necessary for the termination of bud dormancy. And cyanamide (H,N
CN)rj Since it is synthesized by treating lime 9 elements with acid, it has properties similar to leaching of lime nitrogen: liquid repellency.

The present invention focuses on the properties of the lime nitrogen leached supernatant and the cyanamide aqueous solution, and attempts to improve the cultivation method by solving the problems of the conventional tea cultivation method described above.

Next, the present invention will be explained in detail.

[Example 1] (Preparation of stock solution) 40 kg of lime nitrogen powder was added to 20 o! Dissolve in water, 30
Stir at ~359C for 2 hours and collect the supernatant after standing for 2 hours (lime nitrogen concentration 20%).

A reference example of the analysis of the components contained in the lime nitrogen leaching supernatant is shown in Attached Table 1.

(Treatment method) The above-mentioned stock solution (lime nitrogen leaching supernatant liquid) is about 5 to 10 times more V
C diluted and sprayed on tea plants in the winter (December to January) after the tea harvest period.

(Results of treatment) Compared to untreated tea plants, old S shed leaves, spontaneous dormancy of buds was interrupted, and germination and growth were accelerated by about 1 to 2 weeks.

[Example 2] (w, liquid) A cyanamide aqueous solution (trade name C-13) was used (cyanamide grade 13.9). VC in this cyanamide aqueous solution
Reference examples of analysis of contained components are shown in Attached Table 2.

(Processing method) About 5 to 1 of the stock solution (cyanamide aqueous solution).

Dilute it several times and use it in the winter after the tea harvest period (December to January)
Spray on K tea plants.

(Results of treatment) Compared to untreated tea plants, the leaves fell, the spontaneous dormancy of the buds was interrupted, and germination and growth were accelerated by about 1 to 2 weeks.

As described above, the present invention is to apply a lime nitrogen leaching supernatant liquid or a cyanamide aqueous solution with a predetermined concentration to the water at the end of the harvesting period.
2.1 I-kanjo-synonym-χνLyy? Since the i-culture of Iqd is made, the drawbacks of the conventional o'JEtv cultivation method are overcome, and the following effects are achieved.

That is, first, due to the herbicidal, insecticidal, and bactericidal effects of the lime nitrogen leaching supernatant liquid and the cyanamide aqueous solution, the leaves fall off, and the aphids that are attached to the words,
Eggs of pests such as mites are removed. Therefore, the occurrence of pests can be suppressed as much as possible, and unlike the conventional method, it is possible to prevent the possibility that new shoots that have germinated and are growing during their growth will be attacked by pests. Second, the deciduous leaves completely prevent the harmful effects on the human body of the disinfectant that was accumulated during the previous cultivation period, making it suitable for drinking tea. In addition, the leaching supernatant liquid of lime nitrogen and the cyanamide aqueous solution have the effect of interrupting dormancy and promoting germination of the buds, thereby interrupting the spontaneous dormancy of the buds and promoting germination growth.
As a result, the time of germination and growth can be shifted from the cycle of pest emergence, and in combination with the removal of pest eggs by shedding leaves, germination can be accelerated by about 1 to 2 weeks. It is possible to further prevent the harmful effects of pests on the sprouts that are still growing and have VC. 24. By interrupting the spontaneous dormancy of the buds and promoting germination and growth, it is possible to prevent the notification of new buds that have just sprouted from April to the beginning of May. By interrupting the spontaneous dormancy of the buds and promoting their germination cover length, the harvest time can be brought forward, and the yield of tea can be increased as much as possible.

Patent applicant: Isamu Fukasawa

Claims (1)

[Claims] A tea cultivation method characterized in that a lime nitrogen leaching supernatant liquid or a cyanamide aqueous solution of a predetermined concentration is sprayed on tea plants in the winter after the end of the harvest period.