论文部分内容阅读
大龄玉米苗根系较发达 ,往往给间苗造成困难 ,即间其中 1棵苗时 ,带起了其它 1棵或几棵苗 ,使原本有余苗的穴孔变成了缺苗 ,有时为避免间苗互相影响只能选择相距较远的留 ,达不到留壮苗的好效果。间大龄幼苗的最好办法是抽心 ,即抽去玉米的心叶部分。其具体操作办法是 :先选择
Elderly corn seedling root more developed, often to the thinning caused difficulties, that is, among the 1 seedlings, with the other one or a few seedlings, so that the hole had more than seedlings into seedlings, and sometimes to avoid the seedlings each other Impact can only choose to stay far apart, not to stay strong effect of good seedlings. The best way to seedlings of young age is pumping heart, that is pumping away the heart of corn leaves part. The specific method of operation is: first choice