Method for manually removing weedy rice

A weedy rice, artificial technology, applied in the direction of gardening methods, botany equipment and methods, rice cultivation, etc.

Active Publication Date: 2021-07-13
江苏沿海地区农业科学研究所新洋试验站
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to: aim at the problem that above-mentioned artificial removal of weedy rice exists, provide a kind of artificial removal method of weedy rice, described method is to select early maturing rice variety, adopt the planting mode of mechanical transplanting or mechanical water drilling, in Spray gibberellin 2 days after the rice is fully eared, and remove weedy rice ears with high heading height in time at 4-5d and 8-9d after spraying. This method can significantly improve the recognition of weedy rice at the heading stage and improve the efficiency of impurity removal. Reduce the leakage rate, the method is easy to learn, easy to operate, easy to implement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Effects of Rice Growth Period on the Weed Removal Efficiency of Rice

[0013] Test method: select rice varieties as Yangjing 3012, Huaidao 5, and Nanjing 9108, and the growth periods are 118d, 122d, and 130d, respectively. Two days after the earing of each variety, 50g of 3% gibberellic acid EC was mixed with Water 15kg, spray evenly on the leaves, that is, the pure dosage of gibberellin per mu is 1.5g, manually remove weed rice ears 4-5d, 8-9d after spraying, and investigate the impurity removal efficiency and omission rate of weed rice respectively after removal , the average density of weedy rice in the test field was 4.3 holes / 100 holes.

[0014] Table 1. The effect of rice varieties with different growth periods on the removal of weedy rice

[0015] Variety Impurity removal efficiency (mu / person / 8h) Leakage rate (points / 100 points) Yangjing 3012 23.5±0.25a 0.07±0.02b Huaidao No.5 22.3±0.17a 0.11±0.01b Southern Japonica 9108 12.7±0....

Embodiment 2

[0018] Effects of Different Doses of Gibberellin on Weedy Rice Removal

[0019] Test method: select the rice variety Yangjing 3012, the growth period is 118 days, spray 1 g, 1.5 g, and 2 g of gibberellic acid per mu 2 days after earing, that is, 33.3 g and 50.0 g of 3% gibberellic acid per mu , 66.7g, mixed with 15kg of water and sprayed evenly on the leaves, 4-5d and 8-9d after spraying, the weedy rice was manually removed. The average density is 4.3 points / 100 points.

[0020] Table 2. The effect of different dosages of gibberellin on the removal of weedy rice

[0021] Pure gibberellin dosage (mu) Impurity removal efficiency (mu / person / 8h) Leakage rate (points / 100 points) 1.0g 18.9±0.21b 0.24±0.03a 1.5g 23.6±0.37a 0.07±0.01b 2.0g 23.7±0.09a 0.09±0.02b

[0022] It can be seen from Table 2 that different dosages of gibberellin have a significant impact on the removal efficiency and dropout rate of weedy rice. Spraying 1.5g gibberellin pure...

Embodiment 1

[0023] In conjunction with embodiment 1, embodiment 2 a kind of weedy rice artificial removal method specifically comprises the following steps:

[0024] 1) Select a rice variety suitable for local cultivation with a growth period of about 120 days.

[0025] 2) The sowing method is mainly machine transplanting, supplemented by water direct seeding. Water direct seeding is carried out by mechanical drill sowing. Unfeasible mechanical or manual throwing is prohibited, and rice plants between rice rows should be removed in time during various stages of rice growth.

[0026] 3) Two days after the full heading stage of rice, mix 50 g of 3% gibberellic acid emulsifiable concentrate with 15 kg of water for even spraying on the leaves.

[0027] 4) After 4-5d and 8-9d after gibberellin spraying, the taller weedy rice ears were removed in time, and the removed rice ears were taken out of the field in time.

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Abstract

The invention relates to a method for manually removing weed rice and belongs to the technical field of rice cultivation. Manual removal is still a main technical means adopted for weed rice control and removal at present, however, due to the fact that homology between the weed rice and common rice is high and the identification degree between the weed rice and common rice is not high, manual removal difficulty of the weed rice is increased, impurity removal efficiency is low, removal omission rate is high, and the rice planting cost is increased. In order to solve the problems existing in manual removal of the weed rice, a rice variety suitable for the local planting growth period of about 120 days is selected, a planting mode utilizing rice mechanical transplanting as a main mode and mechanical water sowing in drill as an auxiliary mode is adopted, 50 g of 3% gibberellic acid missible oil is mixed with 15 kg of water to be evenly sprayed on leaf surfaces of each mu 2 days after full heading of the rice, high weed rice ears are removed in time in two times 4-5 days and 8-9 days after spraying, and the rice ears are taken out of the field. By applying the method, the identification degree of the heading stage of the weedy rice can be remarkably increased, the removal efficiency of the weedy rice is improved, the removal omission rate is reduced, the overall quality and the rice yield of the rice can be improved, and the economic benefit is very remarkable.

Description

technical field [0001] The invention relates to a method for manually removing weedy rice and belongs to the technical field of rice cultivation. Background technique [0002] Weedy rice is one of the three most difficult weeds to control in rice production because of its dual nature of rice and weed growth. At present, the production generally passes strict seed inspection, deep soil plowing, and early watering before rice planting to induce Killing weedy rice after germination, crop rotation, manual removal, using specific rice varieties to select between oxazolinone herbicides and weedy rice, chemical control, etc., each method has its own advantages and disadvantages , manual removal is still the main method currently used for the control of weedy rice, but due to the high homology between weedy rice and common rice, the degree of identification between the two is not high, which increases the difficulty of manual removal. Rising costs lead to manual removal of weedy ri...

Claims

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Application Information

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IPC IPC(8): A01G13/00A01G7/06A01G22/22
CPCA01G13/00A01G7/06A01G22/22
Inventor 崔必波李亚芳晏军郭树庆李斌庄东英
Owner 江苏沿海地区农业科学研究所新洋试验站
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