论文部分内容阅读
1.叶片观察法:在制种田选用代表性的父、母本植株各10～20株,用红漆标叶片数,根据叶片数推算花期能否相遇,一般要求母本比父本多1～2片叶为宜。 2.幼穗分化观察法:约10～13片叶时,选有代表性的父、母本植株1～2棵剥叶观察幼穗分化的情况,一般要求玉米制种,生长锥母本是父本的2～3倍为宜,否则就应调整。 3.调整方法①苗期母本留齐苗,父本留大小苗。②拔节后对生长慢的亲本,通过偏施肥,多耪,遇
1 leaf observation method: selection in the system of farming representative of the parent and the female plant each 10 to 20 strains, with red paint the number of leaves, according to the number of leaves can be estimated flowering can meet, the general requirements of the mother than the parent 1 ~ 2 leaves is appropriate. 2. Panicle differentiation observation method: about 10 to 13 leaves, select the representative of the parent and female plants 1 to 2 stripped leaves observed spike differentiation, the general requirements of corn seed, growth cone mother is Paternal 2 to 3 times is appropriate, otherwise it should be adjusted. 3 adjustment methods ① seedling mother leave Qi Miao, father to stay the size of seedlings. ② after jointing slow growth of the parents, fertilization by partial, more 耪, case