【摘要】 2000年9月~2002年7月在北京地区研究施氮对高羊茅(F estuca arund inacea)种子产量组分和产量的影响。结果表明,随着施氮量的增加,生殖枝数/m2增加,施氮150 kg/hm2(2001)和120 kg/hm2(2002)生殖枝数/m2达到最高,施氮量继续增加,生殖枝数/m2反而下降;2001和2002年种子产量都随着施氮量的增加而增加,其中以施氮150 kg/hm2(秋季75 kg/hm2+春季75 kg/hm2)种子产量最高,分别为1864 kg/hm2和1954 kg/hm2。更多还原

【Abstract】 Effect of fertilization-N on tall fescue seed yield and yield components of seed crop were studied in the Beijing area during 2000～2002. The results showed that fertile tiller/m~2 achieved the maximum quantity when 150 kg/hm~2 N in 2001 and 120 kg/hm~2 N in 2002 were applied. However, further increasing of N fertilizer decreased the number of tall fescue fertile tiller per square meter. Maximum seed yields of 1864 kg/hm~2 and 1954 kg/hm~2 were garnered when 150 kg/hm~2 N(Autumn75 kg/hm~2+Spring75 kg/hm~2)was applied in 2001 and 2002 respectively.更多还原