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Rice field grass control method

A technology for paddy fields and duckweed, applied in the field of weed control in paddy fields, can solve problems such as no reports in research, and achieve the effects of saving time, reducing germination rate, and reducing dosage

Inactive Publication Date: 2015-07-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it is also a good feed for raising ducks and fish in rice fields. Experts at home and abroad have done a lot of research on the use of duckweed, but there is no report on the use of duckweed and other biological methods to control weeds in rice fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Implementation time: June 2013-October 2013

[0037] Implementation location: Qingpu District, Shanghai (clay soil, pH 6.5)

[0038] Test plan: 3 treatments were implemented in this test, namely control CK (without any weeding behavior), conventional CH (according to conventional field management, regular manual weeding), experiments W1, W2, W3, W4, W5 (40g / m 2 , 80g / m 2 , 120g / m 2 、160g / m 2 、200g / m 2 duckweed, do not do other weeding behavior). Each treatment was repeated 3 times, arranged in random blocks, and the area of ​​each plot was 100m 2 , The field ridge was repaired up to 50cm.

[0039]1) With multi-root Ziping, less-root Ziping and Qingping as the initial materials, the varieties are expanded in a sterile room first, and the process conditions are: temperature 30°C, light intensity 3000±200lux, light-to-dark ratio 16:8 , pH is 4.5 in the complete culture solution cultured for 5 days; then each species of duckweed cultivated in the aseptic room is pl...

Embodiment 2

[0044] Implementation time: June 2013-October 2013

[0045] Implementation location: Qingpu District, Shanghai (clay soil, pH 6.5)

[0046] Experimental plan: In this experiment, 3 treatments were implemented, namely control CK (no weeding), conventional CH (regular field management, manual weeding), and test W (duckweed, no other weeding). Each treatment was repeated 3 times, arranged in random blocks, and the area of ​​each plot was 64m 2 , The field ridge was repaired up to 50cm.

[0047] 1) With multi-root Ziping, less-root Ziping and Qingping as the initial materials, the varieties are expanded in a sterile room first, and the process conditions are: temperature 30°C, light intensity 3000±200lux, light-to-dark ratio 16:8 , pH is 4.5 in the complete culture solution cultured for 5 days; then each species of duckweed cultivated in the aseptic room is placed in the greenhouse small pond (the size of length × width × height is 1m × 0.5m × 0.8m) for large-scale cultivation ...

Embodiment 3

[0052] Implementation time: June 2014-August 2014 (clay soil, pH 6.5)

[0053] Implementation location: Qingpu District, Shanghai

[0054] Experimental plan: In this experiment, 3 treatments were implemented, namely control CK (no weeding), conventional CH (regular field management, manual weeding), and test W (duckweed, no other weeding). Each treatment was repeated 3 times, arranged in random blocks, and the area of ​​each plot was 64m 2 , The field ridge was repaired up to 50cm.

[0055] 1) With multi-root Ziping, less-root Ziping and Qingping as the initial materials, the varieties are expanded in a sterile room first, and the process conditions are: temperature 30°C, light intensity 3000±200lux, light-to-dark ratio 16:8 , pH is 4.5 in the complete culture solution cultured for 5 days; then each species of duckweed cultivated in the aseptic room is placed in the greenhouse small pond (the size of length × width × height is 1m × 0.5m × 0.8m) for large-scale cultivation ,...

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Abstract

Disclosed is a rice field grass control method. Three kinds of duckweeds of multi-root spirodela polyrrhiza, few-root spirodela polyrrhiza and common duckweeds are used as initial materials to be subjected to I-stage and II-stage cultivation to be mixed according to a proportion and spread in irrigated rice fields uniformly. According to the grass control method, an ecological method is used for controlling the germination of field weeds, and accordingly, the field weed germination rate is reduced greatly, the harm of weeds is reduced, and the production of crops is guaranteed; the rice field chemical herbicide use amount can be reduced effectively, the field manual or mechanical weeding time is saved, weed chemical resistance, ecological balance destroy and the like are prevented, the contribution to rice field microenvironment adjusting is huge, and sustainable management of weeds is achieved effectively.

Description

technical field [0001] The invention relates to biological application technology, in particular to a method for controlling grass in paddy fields. Background technique [0002] Weeds are one of the important components of plant diversity in rice field ecosystems. They are characterized by many types, vigorous growth, and difficult control, which have a great impact on crop production. Weeds in rice fields not only compete with rice for glory, grab water and fertilizer, but are also breeding grounds for diseases and insect pests, which reduce the yield and quality of rice. There are about 30,000 species of weeds in the world, of which about 1,800 species will have adverse effects on crop production, which in turn will lead to a crop yield reduction of up to 9.7%. Therefore, in the process of crop production, the field management of weeds is a very important link. [0003] There are many kinds of weeds in rice fields, and their vitality is tenacious and difficult to eradica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G31/00
Inventor 沈健英陈侠桦黄荣松郭利利
Owner SHANGHAI JIAO TONG UNIV
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