【摘要】 为探索南方型杨树不同土壤立地条件集约栽培途径，在江汉平原选择有代表性的3种土壤立地，进行氮、磷、钾常规肥料不同施肥量及配比施肥试验（1991～1995）。结果表明：氮肥效应普遍显著；单施磷、钾肥效应均不好。平原粘湿土壤还呈显著负效应，只宜单施氮肥；平原冲积上、湖区沉积土立地均以氮＋磷混施效应最佳。优化施肥量：平原粘湿上按400kgN／hm2、平原冲积土按200kgN／hm2＋100kgP2O5／hm2、湖区沉积土按100kgN／hm2＋100kgP2O5／hm2，分别折算成尿素或过磷酸钙施用。5a提高蓄积生长量35％～80％，增值额0．7～1．1万元／hm2。更多还原

【Abstract】 A five consecutive years (1991~1995) test on fertilizer-application effects of the ordinary N,P,K fertilizers being fertilized in the frist ten days of the Mays of the four proceeding test years (1991~1994)With different application rates and proportions of N:P:K was made in the selected three site types of representative poplar tree’s soils in Jianghan plain for exploration to the way of intensively-cultivating southern type of poplar tree under different site types of soils. The results are 1) Overall significant effects of single N fertilizer; 2) Overall bad or not better effects of single P or K fertilizer,even siginificantly negative effect in clay wet soil of the plain (Ⅰ site type). and only N fertilizer suitable 3) optimum effects of mixed N and P fertilizers in the plain’s alluvial soil (Ⅱ) and sedimentary soil in the lake region (Ⅲ); (for Ⅰ. 4) the optimum application rate (total): 400kg N/hm2 for 1, 200 Kg N+ 100kg P2O5/hm2 for Ⅱ, 100 kg N+ 100kg P2O5/ hm2 for,Ⅲ;The practically applicated rate:reflected value of N into Urea,P2O5 into Calcium superohosphate,5) 35%~75% increase of increment for growing stock,equal to 7~11 thousand yuan/hm2 of vaule-added.更多还原