Method for removing duckweed inside chufa field

Abstract

The invention belongs to the technical field of duckweed removal in a farmland, and relates to a method for removing duckweed inside a chufa field. The method comprises the steps that conventional management is performed after chufa seedlings are transplanted into a land for growing field crops, chufa seedlings inside the land for growing field crops are subjected to tillering and sucker division growth to 15 days or shorter before closing of crops, water inside the land for growing field crops is naturally dried, it is kept that no water is drained into the land for growing field crops within 2-6 d, field mud is settled, duckweed falls down and is placed and stuck to a soil surface along with falling of water inside the land for growing field crops, the duckweed and soil are tightly dependent, after field soil cracks due to the fact that the water content is lowered, water is drained into the land for growing field crops, duckweed tightly dependent to soil will not float on the water surface again, the duckweed is physiologically dead due to the fact that duckweed is isolated from air inside water, and duckweed inside the chufa field can be removed. The method has the advantages that field drainage is performed for 2-6 d before closing of crops, so that duckweed can be killed, organic fertilizer inside the chufa field can be increased, and the effects of achieving ventilation and detoxification, increasing the soil temperature, promoting root growth, saving energy, fertilizing the soil and removing duckweed are remarkable.

Description

technical field [0001] The invention belongs to the technical field of removing duckweed in farmland, in particular to a method for removing duckweed in a water chestnut field. Background technique [0002] Commonly referred to as duckweed includes Qingping and Ziping in Duckweedaceae (belonging to the phylum Monocotyledons), Manjianghong in the family Pteridaceae (belonging to the phylum Pteridophyta), and Sophora japonica (belonging to the phylum Pteridophyta). Huai Ye Ping and so on. Duckweed and Zipain reproduce by buds, while Huaiyeping and Manjianghong reproduce by spores or vegetatively. These "special" weeds often occur mixedly and grow luxuriantly, forming floating groups densely covering the water surface, gathering in clumps, covering the water surface, causing lack of light, oxygen, and low temperature in the water, seriously affecting the normal growth and development of crops. Therefore, farmers have an urgent desire to remove duckweed in farmland. [0003] ...

AI Technical Summary

Problems solved by technology

The labor cost of salvaging duckweed in water chestnut fields is high, and it is difficult for farmers to accept it; it is unsafe to use herbicides, and there are few safe herbicides for water chestnuts on the market; In the middle and on the soil surface, the duckweed on the stalks and in the grass on the ridge of the field is not easy to die. It is easy to survive after rehydration, and it will reproduce in large numbers after survival.

It is a good method to remove duckweed by breeding grass carp, etc. Unfortunately, water chestnuts are seriously infested with diseases and insect pests, and the number of control times is too high, so the operation is difficult. Practice has proved that water chestnut fields are not suitable for breeding grass carp