论文部分内容阅读
要提高玉米单产,除选用优良品种、适时播种和加强苗期田间管理外,尤其要加强玉米生产中后期的田间管理,以减少空秆和“秃穗”,达到高产的目的。具体措施就在于把住以下六个关口: (一)穗肥追施关 玉米在抽雄前10天,接近大喇叭口期追穗肥。此期是决定果穗大小、籽粒多少的关键时期,也是玉米一生中需肥量最多的阶段。需肥量应占追肥总量的50％～60％,故称玉米的需肥临界期。尤其对中低产地块和后期
To improve corn yield, in addition to selection of fine varieties, timely sowing and strengthening of field management at seedling stage, in particular, to strengthen corn production in the late field management, in order to reduce the empty stalk and “bald spike” to achieve high yield purposes. Specific measures lie in the following six checkpoints: (A) Sui Zhuang maize corn top 10 days in the tassel, close to the big bell mouth to find the panicle. This period is to determine the size of the ear, the critical period of how much grain, corn is the most needed fertilizer in the life of the stage. The amount of fat to be accounted for 50% of the total fertilizer to 60%, so it needs critical period of corn fertilizer. Especially for low-yield land and late