获得多年生禾草种于高产、稳产的关键,首先是改善其氮素营养。但在潮湿生长条件和灌溉,特别是在水泛地上施氮肥时,常引起植物倒伏,强烈分蘖,徒长,生殖枝长得很长,稳固性相当低。采种草层开花期倒伏时,对于授粉和种子形成极为不利;同时也 The key to obtaining perennial grasses for high yields and stable yields is first to improve their N nutrition. However, wet growth conditions and irrigation, especially in the flooding of nitrogen fertilizer, often cause plants to lodging, strong tiller, leggy, reproductive branches grow very long, very low stability. When collecting the grass flowering stage lodging, pollination and seed formation is extremely unfavorable; at the same time