Weed preventing and controlling method for sweet sorghum

A sweet sorghum prevention and control technology, applied in the field of weed control in sweet sorghum cultivation, can solve the problems of sweet sorghum without suitable herbicides, damage to the next crop, and large manpower consumption, so as to facilitate activities and reproduction, improve Effect of fertilizer supply and labor intensity reduction

Inactive Publication Date: 2016-08-24
GANSU RES INST OF AGRI ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the weeding method of chemical pesticides may remain in the soil, causing harm to the next crops and polluting the environment. With the adaptability of weeds to pesticides, it is necessary to continuously develop new herbicides with strong weeding ability. Nevertheless, Simple chemical pesticides can

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In mid-April, before sowing sweet sorghum, choose a weather with a light intensity of 2000lx and a temperature lower than 25°C, and use 50% promethazol with a mass concentration of 22% promethachlor and 28% atrazine. The herbicide solution is evenly sprayed on the soil surface, and the usage rate of the herbicide is 3000ml / hm 2 , Lay plastic film immediately after spraying, the width of described plastic film is 140cm, thickness is 0.008mm. After 15 days of laying the mulch film, artificial drilling was performed to sow sweet sorghum, and then drip irrigation was carried out.

[0041] When sweet sorghum grows to 4 leaves and 1 heart, the plant height, leaf width, leaf length, stem thickness, root number, root length, tillering and other traits of sweet sorghum are investigated. At the same time, the sweet sorghum field without mulching and spraying herbicides was used as the control.

Embodiment 2

[0043] At the end of April, before sowing sweet sorghum, the weather with light intensity no higher than 2500lx and temperature lower than 23°C was selected, and 50% promethazol composed of 25% promethachlor and 25% atrazine was used. The herbicide solution is evenly sprayed on the soil surface, and the usage rate of the herbicide is 4800ml / hm 2 , Lay plastic film immediately after spraying, the width of described plastic film is 110cm, and thickness is 0.01mm. After 10 days of laying the mulch film, artificial drilling was performed to sow sweet sorghum, and then drip irrigation was carried out. When sweet sorghum grows to 4 leaves and 1 heart, the plant height, leaf width, leaf length, stem thickness, root number, root length, tillering and other traits of sweet sorghum are investigated. At the same time, the sweet sorghum field without mulching and spraying herbicides was used as a control.

Embodiment 3

[0045] In the first ten days of May, before sowing sweet sorghum, choose the weather with light intensity no higher than 3000lx and temperature lower than 20°C, and use 50% promethachlor with a mass concentration of 28% promethachlor and 22% atrazine. ﹒ The herbicide solution is evenly sprayed on the soil surface, and the usage rate of the herbicide is 3750ml / hm 2 , Lay plastic film immediately after spraying, the width of described plastic film is 110cm, and thickness is 0.01mm. After 12 days of laying the mulch film, artificial drilling was performed to sow sweet sorghum, and then drip irrigation was carried out. When sweet sorghum grows to 4 leaves and 1 heart, the plant height, leaf width, leaf length, stem thickness, root number, root length, tillering and other traits of sweet sorghum are investigated. At the same time, the sweet sorghum field without mulching and spraying herbicides was used as a control.

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Abstract

The invention provides a weed preventing and controlling method for sweet sorghum. The weed preventing and controlling method is characterized in that at the period of spring sowing, a weed killing agent with the mass concentration of 44-56% is uniformly applied on the soil before sowing, so that not only is the weed killing effect better, but also the hazard degree for planted crops is low. A mulching film is laid immediately on soil using the weed killing agent, and is used for preventing reduction of the pesticide effect due to volatilization caused by illumination or decomposition of the weed killing agent; and the result shows that the weed killing effect is good when the dosage of the yibingcao-you weed killing agent with the concentration of 50% is 3750ml/hm<2>, and the influence on growth and development of the sweet sorghum for forage use is less. The weed preventing and controlling method provided by the invention has the advantages that the complete suppressing action on growth of weeds in the sweet-sorghum field is achieved, and the preventing effect can reach 100%; and the weeds such as amaranthaceae, gramineae and chenopodiaceae in the sweet-sorghum field can be effectively prevented and killed. The weed preventing and controlling method provided by the invention is a feasible technical measure adapting to the development requirement in the modern agriculture, can save the cost investment in production of the sweet sorghum and relieve the labor intensity, and plays an important role in production of the sweet sorghum.

Description

technical field [0001] The invention belongs to the technical field of crop cultivation management, and more specifically relates to a weed control method suitable for sweet sorghum cultivation. Background technique [0002] Farmland weeds are an integral part of the agricultural ecosystem, which competes fiercely with crops and affects agricultural production directly or indirectly. The main hazards of weeds include: competing with crops for water, nutrients, light and space, spreading diseases and insect pests, and reducing yield and quality. The crop loss caused is second only to diseases and insect pests. [0003] Sweet sorghum, as an emerging sugar, feed and energy crop, has attracted more and more attention from all over the world. Forage sweet sorghum is a high-yielding, nutritious herbivorous livestock feed crop. However, due to the slow growth of sweet sorghum at the seedling stage, the competition ability to weeds is weak, and in severe cases, the seeds will be ...

Claims

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Application Information

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IPC IPC(8): A01M21/04
CPCA01M21/043
Inventor 王致和张肖凌张秀华唐桃霞
Owner GANSU RES INST OF AGRI ENG TECH
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