论文部分内容阅读
通过在春秋季分别施肥,研究施肥时期对狗牙根种子生产的影响,结果表明:①不同施肥时期对狗牙根生殖枝数影响显著。春施磷酸二铵150 kg/hm2生殖枝数比对照提高65.34%,秋施尿素150 kg/hm2生殖枝数比对照提高49.71%。②不同施肥时期对狗牙根种子产量及其构成因子的影响显著,可增加小穗数、种子数,提高结实率。春施磷酸二铵150 kg/hm2种子产量达336.40 kg/hm2,比对照增产70.07%;秋施磷酸二氢钾100 kg/hm2,狗牙根种子产量达316.00 kg/hm2,比对照增产53.23%。
The effects of fertilization period on the bermudagrass seed production were studied by applying fertilizers in spring and autumn respectively. The results showed that: ①Different fertilizations had a significant effect on the reproductive branch number of bermudagrass. The amount of reproductive branches in spring applying 150 kg / hm2 of DAP was 65.34% higher than that in the control, and the number of reproductive branches in the urea application 150 kg / hm2 increased 49.71% compared with the control. ② The effects of different fertilization periods on the bermudagrass seed yield and its components were significant, and the number of spikelets and seeds could be increased and the seed setting rate could be increased. The yield of seeds of 150 kg / hm2 for spring application of DAP was 336.40 kg / hm2, 70.07% higher than that of the control; 100 kg / hm2 of potassium dihydrogen phosphate for autumn and 316.00 kg / hm2 for Bermudagrass, 53.23% more yield than the control.