摘要
通过观察无芒雀麦在大连市普兰店地区的生长和生殖特性发现 1999年该地的气候条件适宜无芒雀麦的生殖发育和种子生产 ,但在种子成熟期的高温干旱导致种子成熟速度加快和种子重量降低。同时 ,还研究了氮肥和植物生长调节剂对无芒雀麦种子产量的影响。施氮量为180kg/hm2 时 ,无芒雀麦的种子产量最高 ,可达 184 4kg/hm2 ,但和施氮量为 150kg/hm2 、12 0kg/hm2和 90kg/hm2 处理间的差异不显著。在无芒雀麦的抽穗初期喷施调嘧啶和多效唑对无芒雀麦种子的各产量构成要素、种子产量和植株高度都没有明显的影响。
The growth and reproductive development of smooth brome was investigated in Puliandian, Liaoning province in 1999. The results indicated that the climate of Puliandian was beneficial to the reproductive development and seed production of smooth brome. However, high temperature and drought accelerated seed maturation and reduced seed weight. The effects of nitrogen and plant growth regulator PP333 and EL500 on seed yield components and seed yield were studied in the same time, the highest seed yield of 1844kg/hm\+2 was achieved with 180kg/hm\+2 N applied, but the difference of seed yield was not significant when nitrogen rate was 180kg/hm\+2, 150 kg/hm\+2, 120kg/hm\+2 and 90kg/hm\+2 respectively and the growth regulators applied in the beginning of head emergence had no effects on seed yield, yield components and plant height.
出处
《中国草地》
CSCD
2001年第4期31-36,47,共7页
Grassland of China
