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适时早播,提高播种质量,是保证玉米苗齐、苗全、苗壮达到高产的关键。郊区高产单位的经验表明,要夺取玉米高产,必须在播种时做好以下几点:一、适时早播:崇明等沿江地区以三月十八至廿日为宜,青浦等低洼地区以三月廿日至廿五日为宜。二、提倡深耕:深耕可加深土壤耕作层,有利玉米根系生长发育。近几年来,有些地方只用手扶拖拉机耕地,深度三寸左右,严重影响玉米根系对土壤养分的吸收,使根
Timely early sowing, improve sowing quality, is to ensure that corn seedling Qi, Miao Quan, Miao Zhuang to the key to high yield. The experience of suburban high-yielding units shows that in order to seize high-yielding corn, the following points must be fulfilled at the time of sowing: I. Sowing timely: Chongming and other coastal areas should be March 18 to 20, low-lying areas such as Qingpu in March From the 20th to the 25th is appropriate. Second, to promote deep plowing: deep plowing can deepen the soil tillage, favorable growth and development of corn roots. In recent years, in some areas, tractors have been used only for cultivating land with a depth of about three inches, which seriously affects the absorption of soil nutrients by the root system of maize.