论文部分内容阅读
1.施肥原则:对于生长健壮的正常禾苗,应以磷、钾肥为主,适量施用氮肥;对于生长较差的禾苗,应以氮肥为主,配施磷、钾肥料,对生长较旺的禾苗,可少施或不施;对于偏施氮肥过多出现徒长、叶色浓绿,叶片披垂的禾苗,一般不宜施用保花肥。从父、母本生育特性来说,父本生育期长,幼穗分化期需肥多,应增加保花肥用量。母本生长期短,一般幼穗分化期不易缺肥,保花肥应少施。如果父、母本生长发育进度不相吻合,需要调节生长发育进度,则对生长发育偏快的亲本以氮肥做保花肥,以推迟生育进度;对生长发育偏慢的亲本则以磷钾肥做保花肥,以促进生长。
1. Fertilization principles: For the growth of healthy seedlings should be normal, mainly phosphorus, potassium, nitrogen fertilizer application amount; poor growth of seedlings should be nitrogen-based, with phosphorus and potassium fertilizer, the growth of more vigorous seedlings , Can be less or not applied; for excess nitrogen partial excessive legless, dark green leaf color, leaf drape of seedlings, the general should not be applied to protect fertilizer. From the father and mother reproductive characteristics, the male parent long growth period, juvenile panicle needs more fertilizer, should increase the amount of Paul fertilizer. Female parental growth period is short, the general spike differentiation is not easy to lack of fertilizer, Paul fertilizer should be applied less. If the parent and the mother of the growth and development do not match the pace of growth and development need to be adjusted, then the growth and development of the parents of nitrogen fertilizer to protect the fertilizer to delay the childbearing progress; Fertilizer to promote growth.