氮磷钾肥施用对莴笋产量、收益及农学效率的影响  

Influence of N, P, K Fertilizer Application on Yield, Net Return and Agronomic Efficiency of Lettuce

作　　者：王树志[1] 徐明阳[1] 

机构地区：[1]天津市宁河县农业技术推广中心,天津301500

出　　处：《天津农业科学》2014年第8期35-37,共3页Tianjin Agricultural Sciences

摘　　要：通过田间小区试验,在天津市武清区研究了氮、磷、钾肥的施用对莴笋产量、经济效益及农学效率的影响。结果表明:氮、钾肥对莴笋产量影响较大,不施氮、钾肥莴笋减产7.4%和6.0%,与OPT处理产量相比,差异均达极显著水平;从经济效益来看,氮、钾肥施用对莴笋经济效益较好,增收分别为4 500元·hm-2和3 465元·hm-2;从养分农学效率来看,N的农学效率为13.5kg·kg-1,P2O5的农学效率为4.9 kg·kg-1,K2O的农学效率为15.5 kg·kg-1,莴笋养分农学效率依次为钾>氮>磷。The field experiment was conducted in a randomized design with four replicates to study the influence of N, P, K fertilizer application on lettuce yield, net return and agronomic efficiency. The results showed that without N and K application, yield was decreased by 7.4% and 6.0% compared with the OPT treatment. The net return of N and K application were increased by 4 500 ￥· hm-2 and 3 465 ￥·hm-2 respectively. The N, P and K agronomic efficiency were 13.5 kg·kg-1, 4.9 kg·kg-1 and 15.5 kg·kg-1.

关 键 词：莴笋 产量 经济效益 农学效率 

分 类 号：S636.206[农业科学—蔬菜学]