(2) plow and rake the land in time to conserve moisture. When the land has just thawed in early spring, we should seize the opportunity to rake the ground. After the soil is thawed, shallow tillage should be carried out as soon as possible, and the tillage depth is about 15 cm. After shallow tillage and fertilization, it should be harrowed immediately to reduce the loss of soil moisture.
(3) Covering with plastic film. It is best to cover with plastic film as soon as possible after shallow tillage, which can not only improve the effect of moisture conservation, but also increase the soil temperature.
(4) timely early broadcast. Timely and early sowing of dryland maize can effectively utilize soil moisture in spring, improve sowing quality, and ensure neat, complete, uniform and Miao Zhuang seedlings. Sow when the soil temperature of 5 ~ 10 cm reaches 10 ~ 12℃.
(5) Reasonable close planting. Seedling density should be determined according to soil fertility level and variety characteristics. 3500 ~ 4000 compact varieties per mu; 3000 ~ 3500 flat works per mu; Planting density can be appropriately increased in early-maturing ecological areas.
(6) Strengthen site management. Tillage at seedling stage to preserve soil moisture; When it rains, topdressing should be done in time at the ear stage to promote ear differentiation and strive for large ears and more grains. In the flowering period, in case of drought, shallow hoes should be used to prevent drought and improve the seed setting rate.
(Zhang)