播种量和施肥量对草坪型草地早熟禾种子生产特性的影响

EFFECTS OF SOWING NORM AND FERTILIZER AMOUNT ON SEED PRODUCTIVE CHARACTERISTICS OF POA PRATENSIS

作者于 1997- 1998年在宁夏农学院实验农场研究了播种量和施肥量对草坪型草地早熟禾种子生产性能的影响。结果表明 ,不同施肥量和播种量对成熟期营养枝高度、生殖枝高度、植株密度、穗密度、穗长、穗轴数、小花数、穗粒数、穗粒重和千粒重均有不同程度的影响。随施肥量增加 ,草地早熟禾种子产量呈递增趋势 ,说明适当增加施肥量可以提高草地早熟禾种子产量。作者建议 ,在草地早熟禾种子生产中 。

The effects of seed rate and fertilizer amount on seed productive characteristics of Poa pratensis were studied on the Experimental Farm of Ningxia Agricultural College during 1997-1998. It is indicated that there be different influences of sowing norm and fertilizer amount on nutritive plant height, reproductive plant height, plant density, head density, spike length, spike stalk, floret, seed number and weight per spike, and thousand kernel weight at the mature period. The seed yields of Poa pratensis raised with the increase of fertilizer application. It showed that appopriate amount of fertilizer application can raise the seed yield of Poa pratensis. It is suggested that appropriate seed rate should be adopted in the Poa pratensis seed production.