摘要
为探讨干旱区农业发展新途径,研究在滴灌条件下不同施肥处理对马铃薯产量、产量构成要素、水分利用效率和肥料利用率的影响。结果表明:N3P2K2(N 326.25kg·hm-2,P2O5138kg·hm-2,K2O 90kg·hm-2)处理下马铃薯株高、大(中)薯数、单株薯重明显提高,小薯数明显降低。在N3P2K2处理下马铃薯产量达到最高,达61 516kg·hm-2。施氮量217.50kg·hm-2处理下,氮肥利用率最高为39.31%;施磷量69kg·hm-2处理下,磷肥利用率最高为16.09%;施钾量45kg·hm-2处理下,钾肥利用率最高为64.67%。N3P2K2处理下水分利用率明显提高,达到了80.17kg·hm-2·mm-1。
In order to explore a new way of agricultural development in arid area,the effect of different fertilizer treatments on potato yield,yield components,water use efficiency,and fertilizer utilization rate under drip-irrigation was researched.The results showed that plant height,number of big（middle）potato and potato weight per plant increased significantly and the number of small potato decreased obviously under N3P2 K2（N326.25kg·hm-2,P2O5138kg·hm-2,K2 O 90kg·hm-2）treatment.Potato yield reached the highest level under N3P2K2 treatment which was 61 516kg·hm-2.Application N of 217.50kg·hm-2 was the highest utilization rate of nitrogen which was 39.31%.Application P of 69kg·hm-2 was the highest utilization rate of phosphate which was 16.09%.Application K of 45kg·hm-2 was the highest utilization rate of potash for 64.67%.Water use efficiency was obviously improved under N3P2K2 treatment and reached 80.17kg·hm-2·mm-2.
出处
《黑龙江农业科学》
2014年第12期46-51,共6页
Heilongjiang Agricultural Sciences
基金
青海省科技厅资助项目(2012-N-164)
关键词
滴灌
干旱区
水分利用率
肥料利用率
drip-irrigation
arid region
water use effficiency
fertilizer utilization rate
