施肥对新灌区灰钙土肥力和小麦产量变化的影响  

EFFECT OF FERTILIZATION SOIL FERTILITY AND WHEAT YIELD ON CALCIUM SOIL IN ARID NEWLY IRRIGATED AREA

作　　者：芦满济[1] 李大祥[1] 秦亚南[1] 王东晖[1] 

机构地区：[1]甘肃省农科院土肥所

出　　处：《西北农业学报》1995年第1期56-60,共5页Acta Agriculturae Boreali-occidentalis Sinica

摘　　要：研究表明，干旱新灌区初灌期灰钙土耕作层土壤肥力的变化，主要取决于有机肥料的施入量，其作用在于增大土壤有机质贮量的同时，增加了土壤全氮贮量，提高了土壤氮、磷、钾的供应水平。各类肥料在小麦产量积累上的作用是：无机氨肥＞有机肥＞无机磷肥，并且，随着灌耕时间的后移或土壤基本肥力的循序更新，后者的作用又有比前者逐次增大的趋势。During the initial stage of irrigation in arid irrigated area,the changes of nutrients and fermity of the top surface calcium soil mainly depend on the amount of applied organic fertilizer.This is because that incrcased soil organic matter reserves,soil nitrate reserves is incrcased at the same time. Thus the supply level of soil N、P and K improved.The nutrients effect statu is in the order:inorganic N fertilizer >organic fertilizer>inorganic P fertilizer.Moreover,with time of irrigation and cultivation goes on,and the basic soil fertility improved gradually the effect statu order is gradually converted.

关 键 词：新灌区 灰钙土 施肥 土壤肥力 小麦 产量 

分 类 号：S512.106.2[农业科学—作物学]