灌水和施肥对岷山红三叶生产性能的影响

研究了不同灌水量和施肥量对岷山红三叶生产性能的影响。结果表明:鲜草产量和干草产量极显著正相关,株高和干草产量显著正相关,株高和分枝数显著负相关,分枝数和草产量相关性极低。不施磷肥或不灌水的情况下,分别增大灌水量(1 000 m3/hm2)和施肥量(P2O5360 kg/hm2+K2O 90 kg/hm2),岷山红三叶的分枝数较多,草产量较高;如果磷肥施用量增加(P2O5120 kg/hm2+K2O 90 kg/hm2),可适当减少灌水量(500 m3/hm2),分枝数和草产量也较高。灌水量和施肥量对红三叶株高无显著影响。

Effects of irrigating and fertilizing on the productivity of Trifolium pratense cv. Minshan

Effects of different irrigation rate and fertilizing rate on the productive performance of Trifolium pratense cv.Minshan were studied.The results showed that the fresh yield had extremely significant correlation with hay yield.The height had remarkable correlation with hay yield,heights had remarkable negative correlation with branch numbers.The correlation between forage yield and branch numbers was extremely low.Increasing irrigation rate(1 000 m3/hm2)and fertilizing rate(P2O5 360 kg/hm2 K2O 90 kg/hm2)could get more branches and higher forage yield for the no P fertilizer and irrigation pasture.Irrigating rate could be relevantly reduced(500 m3/hm2)if the P fertilizer application rate was increased(P2O5 120 kg/hm2 K2O 90 kg/hm2)and high branch numbers and forage yield could be achieved.The effects of irrigation and fertilizing on height were not significant.