Method for preserving soil moisture for dry field through maize straw mulching
A technology of corn stalks and straws, which is applied in the field of dryland corn stalks to cover and preserve moisture, can solve the problems that wheat growth is susceptible to drought and dryland corn stalks cannot be effectively used, and achieve the goals of suppressing weeds, strong drought resistance of wheat, and reducing surface runoff Effect
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Embodiment 1
[0017] 1) After the corn is harvested, the stalks are chopped and covered on the wheat sowing belt, and the straws are connected end to end, so as to avoid the bare surface of the wheat sowing belt as much as possible.
[0018] 2) Before wheat sowing, the corn stalks are transferred to the blank row reserved next to it, and the sowing belt is prepared by rotary tillage or manual excavation.
[0019] 3) After the land preparation, spread the base fertilizer on the sowing belt, with the amount of pure nitrogen 7kg / mu, phosphorus pentoxide 6kg / mu, and potassium oxide 5kg / mu.
[0020] 4) After spreading the base fertilizer, use a 2B-4 type seeder to sow, and each sowing belt sows 4 rows, and each row
[0021] The distance is 25cm.
[0022] 5) After sowing, cover the straw between the sowing rows of the wheat sowing belt, which can not only achieve the effect of moisture conservation, but also not affect the emergence of wheat seedlings.
Embodiment 2
[0023] Example 2 This method was adopted in Jielin Village, Yucheng Township, Jianyang City, from 2008 to 2009. After the corn was harvested on August 15, 2008, the stalks were cut down and covered on the wheat sowing belt on the spot, and the wheat was sown on November 5. Remove the stalks before planting, and cover the stalks between the wheat sowing rows after sowing. The soil moisture content of the plow layer before sowing wheat in this method is 19.2%, and that in fields without straw mulching is 18.1%; the emergence rate of wheat in this method is 92.0%, and that in fields without straw mulching is 87.2%; The moisture contents were 16.2%, 15.4%, 12.1%, respectively, and the fields without straw mulching were 14.7%, 13.9%, and 9.7%; the wheat yield per unit area of this method was 260.8kg / mu, and the field without straw covering was 234.2kg / mu.
Embodiment 3
[0024] Example 3 This method was adopted in Jielin Village, Yucheng Township, Jianyang City, from 2009 to 2010. After the corn was harvested on August 20, 2009, the stalks were cut down and covered on the wheat sowing belt on the spot, and the wheat was sown on November 3. Remove the stalks before planting, and cover the stalks between the wheat sowing rows after sowing. The soil moisture content of the plow layer before sowing wheat in this method is 22.3%, and that in fields without straw mulching is 18.6%; the emergence rate of wheat in this method is 91.5%, and that in fields without straw mulching is 85.8%; The moisture contents were 14.1%, 12.6%, and 15.3%, respectively, and the fields without straw mulching were 11.9%, 11.8%, and 12.4% respectively; the wheat yield per unit area of this method was 218.2kg / mu, and the field without straw mulching was 150.4kg / mu.
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