采用大田试验,以同德短芒披碱草为材料,分析氮磷肥配施对种子产量、饲草产量饲草品质和经济效益的影响.结果表明:随着氮肥用量的增加,披碱草种子产量先增加后减小,以120kg P2O5·hm-2为肥底时的最佳氮肥施用量为59 kg N·hm-2;饲草产量逐渐增加,以120kg P2O5·hm-2为肥底时的最佳氮肥施用量为129 kg N·hm-2.随着磷肥施用量的增加,披碱草种子产量增加,以60 kg N·hm-2为肥底,最佳磷肥施用量为217 kg P2O5·hm-2;饲草产量逐渐趋于稳定,以60 kg N·hm-2为肥底,最佳磷肥施用量为238 kg P2O5·hm-2.粗蛋白含量随着氮肥施用量的增加而增加,随磷肥施用量的增加先增加后减少.经济效益随氮肥和磷肥施用量增加均表现先增加后减少,P180处理经济效益最大,为11901元·hm-2,较P0处理增收43.8％,较CK处理增收2.3倍.建议同类地区根据种植目的选择适宜的施肥方案.
THE EFFECT OF NITROGEN AND PHOSPHORUS FERTILIZER ON THE OUTPUT OFELYMUS BREVIARISTATUS
The field test was used to analyze the effects of nitrogen phosphorus fertilizer on seed yield,forage yield,quality and economic benefits.The results showed that the yield of alkaline grass seeds increased first and then decreased with the increase of nitrogen fertilizer application and the best application dosage of nitrogen fertilizer was 59 kg N·hm-2 when bottam fertilizer was 120 kg P2O5·hm-2.The best nitrogen fertilizer application was 129 kg N·hm-2,which was best for the Elymus dahuricus seeds yield when the bottom fertilizer was 120 kg P2O5·hm-2.With the increase of phosphorus fertilizer,the best nitrogen fertilizer application was 217 kg P2O5·hm-2 and the optimal phosphate fertilizer was 238 kg P2O5·hm-2,which was best for yield of alkaline grass seeds when the bottom fertilizer was 60 kg N·hm-2.Crude protein contents were increased with the nitrogen fertilizer increase.But crude protein contents were increased and then decreased with phosphorus fertilizer increase.The economic benefits increased and decreased with the increase of nitrogen and phosphorus fertilizers.The increase in the amount of phosphorus fertilizer first increases first.The maximum economic benefits was 11 901 yuan.hm2 of P180 treatment,which were increased 43.8％and 2.3 times than P0 and CK treatment,respectively.It was recommended that similar regions choosed appropriate fertilization solutions according to the purpose of planting.
Elymus breviaristatusNitrogen and phosphorus fertilizerSeed yieldDry grass yield
NETL
NSTL
万方数据
