不同氮肥水平影响下的水稻根系吸氮率特性分析  

Effects of Different Nitrogen Application Rates on SAR_N Properties of Rice

作　　者：焦峰[1] 吴金花[1] 张兴梅[1] 辛刚[1] 翟瑞常[1] 

机构地区：[1]黑龙江八一农垦大学农学院,黑龙江大庆163319

出　　处：《土壤通报》2009年第6期1353-1355,共3页Chinese Journal of Soil Science

基　　金：国家科技攻关计划"食品安全关键技术应用的综合示范"资助(2001BA804A43)

摘　　要：应用Logistic模型研究了不同氮肥水平对水稻根系吸氮率(SARN)特性的影响,通过SARN值表征水稻根系活力。结果表明,水稻生育进程中单位面积氮素的吸收量符合Logistic生长曲线模型;不同处理水稻根系对氮素反应能力的差异主要表现在分蘖期,从整个生育期来看,SARN值表现出持续下降的趋势,水稻根系的氮吸收量逐渐减少,至成熟期前,单位根量几乎停止对氮素的吸收。The effects of different nitrogen application rates on SARN properties of rice are studied with Logistics＇ growth model in this paper. The results are as follows： The N absorption curve of rice accords with the Logistic equation. It is at tiller stage that the capacity difference of absorbing N of root is apparent. In the growth phase, SA RN value shows a continued downward trend. Absorbing N almost stops at mature stage

关 键 词：氮肥水平 水稻 SAR. 

分 类 号：S143.1[农业科学—肥料学]