水稻水氮互作效应与产量模型研究  

Studies on interactions between soil moisture and nitrogen and yield models in rice

作　　者：陈新红[1] 刘凯[2] 王志琴[2] 杨建昌[2] 

机构地区：[1]淮阴工学院生化学院农学系,江苏淮安223001 [2]扬州大学农学院农学系,江苏扬州225009

出　　处：《西北农林科技大学学报（自然科学版）》2006年第9期141-148,共8页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家自然科学基金项目(30270778;30370828);江苏省自然科学基金项目(BK2003041)

摘　　要：以武育粳3号和汕优63为材料,采用盆栽试验研究了不同生育时期土壤水分与氮素营养的互作效应,并建立了土壤水分和施氮量互作与产量关系的模型。结果表明,土壤水分和氮素营养对水稻生长有明显的互作效应,其效应的大小因土壤水分胁迫程度、施氮量、水稻生育时期不同而有较大差异;全生育期、抽穗前土壤水分胁迫条件下水稻产量呈下降趋势,在一定氮肥水平(M N、HN)下轻度土壤水分胁迫(Ψso il≥-20 kPa),对产量的影响无显著差异;结实期进行适当的土壤水分胁迫(Ψso il≥-25 kPa)与氮肥(M N、HN)处理,可达到节水而不减产的目的;严重土壤水分胁迫(Ψso il≤-50 kPa)不论在何种氮肥水平下,均使水稻产量降低,高氮水平下影响更显著;在全生育期,抽穗前和结实期进行土壤水分处理,最适施氮量均表现为随土壤水分胁迫程度的加重而减少的趋势。Using Wuyujing 3 and Shanyou 63 as experiment materials,the coupling effects between soil water deficit and N levels,and the establishment of yield model in rice were studied. The results showed that there were visible interactive effects between soil moisture and N levels on rice yield. The strength of the effects depended on the degree of soil water deficit,N levels,and growing stages. Rice yield decreased due to soil water deficit in the growing period or before heading ,no remarkable effect on rice yield for light soil water deficit （Ψsiol≥-20 kPa） and the optimum N level （MN or HN）. But through optimum soil water deficit （Ψsiol≥-25 kPa） rice yield would not decrease and may be economized during grain filling period. Whether nitrogen level was high or low,yield would be decreased through heavy soil water deficit （Ψsiol≤-50 kPa）;The optimum nitrogen level would be decreased with soil water cumulative deficit in any growing stages.

关 键 词：水稻 土壤水分 氮素 互作效应 产量模型 

分 类 号：S511.062[农业科学—作物学] S511.071