Method for preventing and controlling rice field weeds

A technology for weeds and paddy fields, applied in the field of weed prevention and control in paddy fields, can solve the problems of herbicide phytotoxicity and food safety, herbicide failure, weed resistance, etc., and achieves low cost, fine prevention and control, and promotion of robust growth. Effect

Active Publication Date: 2019-01-18
HUNAN PLANT PROTECTION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high technicality of herbicide application in production practice, if it is used improperly, such as inaccurate application time, unreasonable selection of herbicide varieties, and incorrect application methods, etc., the herbicide will fail and lead to rice yield reduction It will also cause farmers to a...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A test area was set up in Caowei Town, Yuanjiang City, Hunan Province. This area belongs to the double-cropping rice area of ​​Dongting Lake, with convenient drainage and irrigation and fine management. The soil is alluvial sandy loam in the lake area, with an organic matter content of 2.2%, a pH value of 6.7, and fertile soil. The rice variety is Xiangzaoxian 24, which was broadcast live on April 6.

[0027] The occurrence of weeds in the paddy field is large. The control area without weeding was investigated on the 20th day and the 40th day after rice sowing, and it was found that the main weeds were barnyardgrass 225-351 plants / m 2 , 51-87 plants / m 2 , 65~89 plants / m 2 , Special-shaped (broken rice) sedge 31-42 plants / m 2 .

[0028] 1. Test plan:

[0029] (1) According to the method for preventing and controlling paddy field weeds of the present invention, paddy field is processed (recorded as processing 1), comprises the following steps:

[0030] Apply ...

Embodiment 2

[0043] An experimental area was set up in Longwangmiao Village, Chunhua Town, Changsha County, Hunan Province. This area is a hilly double-cropping rice area with convenient drainage and irrigation, but extensive cultivation and management. The soil is light reddish yellow mud with an organic matter content of 2.0%, pH value of 6.5, and soil fertility. medium. The rice variety is Zhongzao 39, sown on April 11.

[0044] The occurrence of weeds in the paddy field is relatively large. On the 20th day and 40th day after rice sowing, we investigated the control area without weeding, and found that the main weeds were barnyardgrass 186-227 plants / m 2 , 31~52 plants / m 2 , 57~66 plants / m 2 , Special-shaped (broken rice) sedges 41-57 plants / m 2 .

[0045] 1. Test plan:

[0046] (1) according to the method for preventing and controlling paddy field weeds of the present invention, paddy field is processed (recorded as processing 3), comprises the following steps:

[0047] A...

Embodiment 3

[0060] The experimental area was set up in Beishan Town, Changsha County, Hunan Province. This area is a hilly double-cropping rice area, with inconvenient drainage and irrigation. The soil is light red yellow mud, with an organic matter content of 2.0%, a pH value of 6.5, and moderate soil fertility. The rice variety is Xiangzaoxian 45, which was sown on April 5.

[0061] The occurrence of weeds in the paddy field is relatively large. On the 20th day and the 40th day after rice sowing, the non-weeded control area was investigated respectively, and it was found that the main weeds were barnyardgrass 165-221 plants / m 2 , 75-89 plants / m 2 , 61~85 plants / m 2 , Special-shaped (broken rice) sedge 49-55 plants / m 2 .

[0062] 1. Test plan:

[0063] (1) according to the method for preventing and controlling paddy field weeds of the present invention, paddy field is processed (recorded as processing 5), comprises the following steps:

[0064] On the 3rd day after rice sowi...

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PUM

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Abstract

The invention provides different methods for preventing and controlling rice field weeds according to the characteristics of different farmland systems. By preventing and controlling rice field weedsat an early growth and development stage within 1 month after rice planting, the weeds are controlled to a germination stage by using herbicides having multiple acting points and utilizing their functions of pre-emergence closing or are controlled within 1-2 leaf stages after weed germination, namely the most sensitive stage of the herbicides, the competition between the weeds and rice for fertilizers, water, light and other resources is decreased to the most degree at the early growth and development stage of rice, and healthy and strong growth of the rice is promoted. By adopting the method,the effect of preventing and controlling main rice field weeds can reach 95% or above, the pesticide resistance of weeds can also be retarded, the use amount of herbicides can also be decreased, andthe method is suitable for prevention and control of domestic rice field weeds.

Description

technical field [0001] The invention belongs to the technical field of plant protection, in particular to a method for preventing and controlling weeds in paddy fields. Background technique [0002] Chemical weeding plays a pivotal role in rice production due to its unique advantages of high efficiency, rapidity and economy. Its promotion and application have greatly liberated productivity and greatly increased labor productivity. It has become an indispensable advanced technology for the realization of agricultural mechanization and modernization, and it is also an important guarantee for high and stable rice yields. At present, more than 100 million hectares of herbicides have been used in my country, accounting for 60% of the total area. Chemical weeding has become the most important measure to prevent and control weeds in paddy fields. With the continuous deepening of agricultural modernization, this trend will accelerate. However, due to the high technicality of herbi...

Claims

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Application Information

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IPC IPC(8): A01G22/22A01G13/00A01N37/22A01N47/36A01N43/66A01N43/08A01N43/90A01N39/04A01P13/00
CPCA01G13/00A01N37/22A01N39/04A01N43/08A01N43/66A01N43/90A01N47/36A01G22/22
Inventor 马国兰刘都才柏连阳刘雪源彭亚军
Owner HUNAN PLANT PROTECTION INST
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