Composite control method for paddy field weeds

A compound control and paddy field technology, applied in the agricultural field, can solve the problems of inability to control grass and unfavorable growth of nitrogen-fixing cyanobacteria, and achieve the effects of ensuring normal growth, avoiding resistance and reducing harm.

Inactive Publication Date: 2015-05-13
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] my country has a vast rice planting area. In the Yangtze River Delta, the suitable growth temperature for nitrogen-fixing cyanobacteria is 28-32°C, and the rice planting period is from late May to early June. good grass control effect
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  • Composite control method for paddy field weeds
  • Composite control method for paddy field weeds
  • Composite control method for paddy field weeds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Implementation time: from June 2014 to October 2014.

[0032] Implementation location: Shanghai Qingpu Modern Agricultural Park.

[0033] Experimental plan: 3 treatments were used, namely blank control CK (without any weeding behavior), conventional CR (according to conventional field management, manual weeding at regular intervals), and experiments (A1, A2, A3, A4, A5, A6). Each treatment was repeated 3 times, and the area of ​​each plot was 20㎡.

[0034] 1) On the day of rice planting, spray 0.0025, 0.025, 0.25, 2.5, 25, 250 g / mu concentration of bensulfuron-methyl wettable powder to A1, A2, A3, A4, A5, A6 test blocks respectively, and keep water for 3 -5cm, keep for 3-4 days.

[0035] 2) On the day when rice is planted and bensulfuron-methyl is sprayed, nitrogen-fixing Anabaena dry algae powder is put into the paddy field at a density of 2600g / mu.

[0036] 3) if Figure 4 As shown, the effects of nitrogen-fixing Anabaena on the total density of weeds in paddy fie...

Embodiment 2

[0038] Implementation time: June 2014 to October 2014

[0039] Implementation location: Shanghai Qingpu Modern Agricultural Park

[0040] Experimental plan: 3 treatments were used, namely blank control CK (no weeding), conventional CR (according to conventional field management, weeding at regular intervals), and experiments (A1, A2, A3, A4, A5, A6). Each treatment was repeated 3 times, and the area of ​​each plot was 20㎡.

[0041] 1) On the day of rice planting, spray 0.0025, 0.025, 0.25, 2.5, 25, 250 g / mu concentration of bensulfuron-methyl wettable powder to A1, A2, A3, A4, A5, A6 test blocks respectively, and keep water for 3 -5cm, keep for 3-4 days.

[0042] 2) 30 days after the rice was planted and sprayed with bensulfuron-methyl, the nitrogen-fixing Anabaena dry algae powder was put into the paddy field at a density of 2600g / mu.

[0043] 3) if Figure 8 The results showed that the impact of nitrogen-fixing Anabaena on the total weed density of paddy field was signif...

Embodiment 3

[0045] Implementation time: June 2014 to October 2014

[0046] Implementation location: Shanghai Qingpu Modern Agricultural Park

[0047] Experimental plan: 3 treatments were used, namely blank control CK (no weeding), conventional CR (according to conventional field management, weeding at regular intervals), and experiments (A1, A2, A3, A4, A5, A6). Each treatment was repeated 3 times, and the area of ​​each plot was 20㎡.

[0048] 1) On the day of rice planting, spray 0.0025, 0.025, 0.25, 2.5, 25, 250 g / mu concentration of bensulfuron-methyl wettable powder to A1, A2, A3, A4, A5, A6 test blocks respectively, and keep water for 3 -5cm, keep for 3-4 days.

[0049] 2) 45 days after the rice was planted and sprayed with bensulfuron-methyl, the nitrogen-fixing Anabaena dry algae powder was put into the paddy field at a density of 2600g / mu.

[0050] 3) if Figure 12 The results showed that the effects of nitrogen-fixing Anabaena on the total density of paddy field weeds were qu...

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Abstract

The invention discloses a composite control method for paddy field weeds. The composite control method comprises the steps that bensulfuron methyl is sprayed synchronously in the process of planting rice, and a chemical method is used for controlling growth of the paddy field weeds; nitrogen fixation anabaena is applied during the period of 30-45 days after the rice is planted, and a biological method is used for further controlling growth of the paddy field weeds. According to the composite control method, the chemical method and the biological method are combined, germination of the weeds is suppressed quickly and effectively, and further germination and growth of the paddy field weeds are controlled under the action of the nitrogen fixation anabaena; as a result, the nitrogen fixation capability and the carbon fixation capability of crops are improved simultaneously, harm of the weeds is greatly reduced, normal growth of the crops is guaranteed, the use amount of paddy field herbicide is reduced, the weeds are prevented from generating resistance, and the composite control method has great significance in maintaining the stability of the ecological system and guaranteeing the quality and yield of the rice.

Description

technical field [0001] The invention relates to agricultural technology, in particular to a compound control method for weeds in paddy fields. technical background [0002] Weeds in paddy fields are an important part of the paddy field ecosystem. They compete with rice for various resources such as light, water, and soil nutrients. Because of their many types, fast reproduction, vigorous growth, and difficulty in controlling and eradicating them, weeds can easily cause crop damage. Yield reduction or even grain failure is an important factor affecting rice yield and quality, resulting in 12.3%-16.5% crop yield reduction every year. Effective field control and management of weeds in paddy fields is crucial to the growth of paddy crops. [0003] Herbicides are a common method of weed removal in farmland systems, and have become an important measure in modern agricultural production because of their time-saving, labor-saving, quick-acting, and high-efficiency herbicidal effects...

Claims

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Application Information

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IPC IPC(8): A01G13/00A01G33/00A01N47/36A01P13/00
CPCA01G13/00A01N47/36Y02A40/80
Inventor 沈健英郭利利黄荣松陈侠桦廖谨之
Owner SHANGHAI JIAO TONG UNIV
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