1.制种地点的选择选择气候延迟,生育期向后推的地区或地块,本育9号生育期偏早,花期又正遇到了高温环境,通过对制种地点的选择可以辟开高温环境,减轻发病率。选择制种地点要注意子粒能够成熟,防止早霜。 2.肥料的利用和施肥方法的改进 (1)增施有机肥,提高土壤有机质含量。增施有机肥对防早衰有特殊作用:a、有机肥肥效长,防止中后期脱肥。b、有机肥含有丰富的。K、肥及多种微量元素,可以增加植株的抗病能力。C、有机肥可以促进土壤团粒 1. The choice of planting site Select climate delay, growth period back push the area or plots, Benyu 9 growth period earlier, flowering and are experiencing high temperature environment, through the choice of seed location can be opened to high temperature Environment, reduce morbidity. Select seed production sites should pay attention to the grain can mature, to prevent early frost. 2. The use of fertilizers and fertilization methods to improve (1) the application of organic manure to improve soil organic matter content. Organic fertilizer on the anti-premature senility have a special role: a, organic fertilizer, long-term, to prevent the latter part of the fat. b, organic fertilizer is rich. K, fertilizer and a variety of trace elements, can increase the plant’s disease resistance. C, organic fertilizer can promote soil aggregate