河西走廊灌漠土定位施肥对土壤肥力及春小麦产量的影响

对河西走廊灌漠土连续11年的定位施肥结果表明:增施有机无机混合肥料,能有效地提高土壤有机质含量;单施氮肥易造成土壤磷肥失调;单施磷肥易造成土壤氮肥失调和钾含量降低;有机肥与氮磷配施,能提高土壤碱解氮、速效磷、速效钾的含量;不同降水年份施肥的增产作用不同,干旱年、正常年和丰水年分别增产56.7%、56.2%和46.6%;有机肥与氮磷肥配施具有较好的土壤增肥和增产作用。

The Influence of Location Fertilization for Irrigated Desert Soils in Gansu Corridor on Soil Fertility and Output of Spring Wheat

The results of location fertilization conducted in irrigated desert soil in Gansu Corridor for 11 years continuously shown that to increase the mixed fertilizer of organic and inorganic fertilizer can effectively increase the concentration of organic substance; phosphate fertilizer in the soil would be easily maladjusted if only apply nitrogenous fertilizer; nitrogenous fertilizer in the soil would be easily maladjusted and the concentration of potash fertilizer reduced if only apply phosphate fertilizer; applying mixed organic, nitrogenous and phosphate fertilizer can increase the concentration of alkali-hydrolyzable nitrogen and rapidly available phosphate and potassium of the soil, the function of increase production by applying fertilizers in the different precipitation years is different, the increased production in a dry year, normal year and wet year is 56.7% , 56.2% and 46. 6% respectively and; the mixed applying of organic, nitrogenous and phosphate fertilizer has very good functions of increasing the soil fertility and production.