不同施肥时期对狗牙根种子生产的影响

Effects of Different Fertilization Time on the Seed Production of Bermudagrass

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%。

A fertilization time experiment is conducted in the spring and autumn respectively,in order to study the effects of fertilization time on the bermudagrass seed production. The results indicated：①It has significant effects of different fertilization time on fertile tillers, when using Phosphate ammonium 150 kg/hm^2 in spring, fertile tillers were increased by 65. 34% and when using urea 150 kg/hm^2 in autumn,it was increased by 49. 71%;②It has significant effects of different fertilization time on the seed yield and its component factors, it has increase the number of spikelet and seed,also the rate of yield was improved;③The bermudagrass seed yield could be increased by Phosphate ammonium 150 kg/hm^2 in spring,and came up to 336.40 kg/hm^2 and was increased by 70.07% compared with CK,and when using Potassium dihydrogen phosphate 100 kg/hm^2 in autumn, seed yield could be increased by 316.00 kg/hm^2 and was increased by 53.23% compared with CK.