水肥耦合效应研究 Ⅰ.不同降雨年型对N、P、水配合效应的影响

RESPONSE AND INTERACTION FOR WATER AND FERTILIZERⅠ INTERACTION OF N, P AND WATER IN THE YEAROF DIFFERENT PRECIPATIONS

本文通过统计分析洛阳地区近３０年的降雨量，模拟洛阳地区３种不同的降雨年型，利用防雨旱棚研究旱地农田Ｎ、Ｐ、水的耦合作用及其对小麦产量影响。研究结果表明：在欠水年土壤水分很低的情况下，通过协调土壤中水分和养分，也会产生激励作用，获得较为理想的产量；各因素间的交互作用是可以通过人为调控措施进行转变的。在正常年份和丰水年，Ｎ１和水为顺序加和作用类型；而Ｎ２、Ｎ３和水为协同作用类型。Ｐ的增产效应相对较低；Ｎ的增产效应和土壤水分紧密联系；

By statistical analysis of the 30 years rainfall of Luoyang, Henan Province, the different pattern of annual precipation were stimulated and the water proof sheld was used to study the interaction and response for N, P and water The result of experiment showed that, under the condition of low water content, the favorable yield could also be gotten through coordinating the water and fertilizer; the interaction type of different elements can change under the control of man made In normal year and the year with high water, the interaction for N 1 and water is sequentially additive type, N 2, N 3 and water are synergistic type, and the response of P is lower correspondingly The response of N have a closely relation with soil water content, and the sequence of response of P in different type of year is: the year with low water>normal year>the year with high water