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Method for weed control in direct-sowing rice field without application of chemical herbicides

A technology of direct-seeding paddy fields and herbicides, which is applied in the field of weed control in direct-seeding paddy fields free of chemical herbicides, to achieve the effects of saving field labor, avoiding the generation of weed resistance, and reducing damage

Inactive Publication Date: 2019-10-22
HUNAN AGRI BIOTECH RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at present, there is still no way to find a method of water management in direct-seeding rice fields, which can not only achieve the purpose of effectively preventing and controlling weeds without chemical herbicides, but also avoid yield reduction due to waterlogging and other defects.

Method used

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  • Method for weed control in direct-sowing rice field without application of chemical herbicides
  • Method for weed control in direct-sowing rice field without application of chemical herbicides
  • Method for weed control in direct-sowing rice field without application of chemical herbicides

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Rice seeds of Nanjing 44 that are resistant to flooding are used;

[0054] (1) leveling the paddy field, watering, water layer 7cm,

[0055] (2) Add biochar (5kg / mu) and water retaining agent (15kg / mu) evenly;

[0056] (3) accelerating the germination of rice seeds resistant to flooding until there are roots and buds;

[0057] (4) The seeding rate is 15 catties / mu

[0058] (5) the seeds of step 4) are artificially sown in the paddy field;

[0059] (6) After rice tillering is completed and the water-retaining agent begins to degrade, water is poured into the paddy field to maintain a water layer of 5 cm until the rice is mature.

Embodiment 2

[0061] The rice seeds of Yongyou 6 which are resistant to flooding were used;

[0062] (1) leveling the paddy field, watering, water layer 8cm,

[0063] (2) Add biochar 10kg / mu and environment-friendly natural water retaining agent 10kg / mu evenly;

[0064] (3) accelerating the germination of rice seeds resistant to flooding until there are roots and buds;

[0065] (4) The seeding rate is 4 catties / mu

[0066] (5) the seeds of step 4) are artificially sown in the paddy field;

[0067] (6) After rice tillering is completed and the water-retaining agent begins to degrade, water is poured into the paddy field to maintain a water layer of 3 cm until the rice is mature.

Embodiment 3

[0069] Y Liangyou 2 rice seeds resistant to flooding were used;

[0070] (1) Leveling the paddy field, watering, water layer 10cm,

[0071] (2) Add biochar 10kg / mu and environment-friendly natural water retaining agent 15kg / mu evenly;

[0072] (3) accelerating the germination of rice seeds resistant to flooding until there are roots and buds;

[0073] (4) The seeding rate is 6 catties / mu

[0074] (5) sow the seeds of step 4) mechanically in the paddy field;

[0075] (6) After rice tillering is completed and the water-retaining agent begins to degrade, water is poured into the paddy field to maintain a water layer of 3 cm until the rice is mature.

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Abstract

A method for weed control in a direct-sowing rice field without application of chemical herbicides includes steps: leveling the rice field, irrigating, and keeping the water depth in a range of 6-10cm; spreading biochar and an environment-friendly water retaining agent into the rice field subjected to primary irrigation; after germination acceleration of seeds of a waterlogging-resistant rice variety, performing broadcast sowing into the rice field; after rice tillering is finished and the water retaining agent starts degradation, performing secondary irrigation in the rice field, and keepingthe water depth in a range of 3-5cm until rice is ripe. The method has advantages that by combination of moisture management and the biochar and the water retaining agent, zero utilization of the chemical herbicides in the direct-sowing rice field is effectively realized while germination of weeds in the rice field can be effectively controlled, weed damages are reduced, crop production is guaranteed, herbicide resistance of the weeds and ecological balance damage are avoided, and crop failure caused by defects of waterlogging and the like can be avoided while effective weed prevention and control can be realized through zero application of the chemical herbicides.

Description

technical field [0001] The invention relates to the technical field of rice planting, in particular to a method for controlling weeds in a direct-seeding paddy field without applying chemical herbicides. Background technique [0002] With the transfer of a large number of rural labor force and concentrated management of land circulation, the shortage of farming labor is becoming more and more prominent. In order to not miss the farming time and sow on time, the majority of rice growers have gradually changed from traditional water seedling cultivation to direct seeding rice cultivation. The direct seeding cultivation method of rice has the advantages of labor saving, time saving, cost saving, and alleviating labor tension in the busy farming season [0003] problems and other advantages. Weeds in plowing and direct-seeding paddy fields are dominated by gramineous weeds such as Dianjinzi and barnyardgrass, which are many and early, and are the most harmful to rice, followed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22A01G13/00
CPCA01G13/00A01G22/22
Inventor 李祖任柏连阳周小毛阳标仁刘利成
Owner HUNAN AGRI BIOTECH RES CENT
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