摘要
该文通过对春小麦２年田间水肥试验结果分析表明：①水肥对春小麦产量、收入有明显的主效应与交互效应。在试验范围内（水分为９％～１８％，肥料为５～２０ｋｇ／亩），水分平均主效应（以１．５％个土壤水分为１个单位）＞肥料平均主效应（以２．５ｋｇ／亩为１个单位）。②春小麦的水肥产量、收入效应为报酬递减函数，生产中存在一个经济合理的水肥耦合区，通常肥料为５～１６．０ｋｇ／亩时，需９％～１７．８％的水分与之配合；若肥料投入超过１６．０ｋｇ／亩至１９．８ｋｇ／亩，并要求亩产在３００ｋｇ以上时，则需１５．５％～１８％的水分与之配合。③在合理区域内，水肥均呈正效应，且既有互补性，又有协同效应。其单位用量产量互补效应为１９．４ｋｇ：１６．５ｋｇ，协同效应为１．５ｋｇ。④水肥主次效应的转换阈值１４．１％，即土壤水分大于１４．１％时，肥效＞水效；水分小于１４．１％时，水效＞肥效；水肥最高产量的理论值为３３６ｋｇ／亩。
Based on pot and field experiments,this paper studies the coordinative effect of moistureand fertilizer on yield and net profit of spring wheat,there are evidents of positive main and interac-tion effect of moisture and fertilizer on spring wheat.The mean main effect of moisture is higherthan that of fertilizer. Effect equations of moisture and fertilizer are the payment decrease function,the effect of moisttire and fertilizer has a rational range,and effect of moisture and fertilizer cancompensated each other,the compensated data is 19.4:16.5.It also indicates that decrease of soilmoisture cai1 be compensated by increase of fertilizer to maintain output of spring wheat,the turn-point of main or second effect of moistire and fertilizer is 14.1%.
出处
《水土保持学报》
CSCD
北大核心
1994年第4期72-78,共7页
Journal of Soil and Water Conservation
关键词
春小麦
水分
肥力
协同效应
spring wheat soil moisture fertilizer coordination effect
