摘要
【目的】确定喷灌作物冠层截留量。【方法】采用称重法在无风条件下对喷灌冬小麦冠层存储能力进行了连续两年测定,并对其影响因素进行了分析。【结果】喷灌初始阶段冠层截留量随灌水量的增加而迅速增加,此后增速逐渐减缓直至达到冠层存储能力。冠层存储能力随冬小麦生长期的变化而变化。在正常植株密度条件下,冬小麦冠层截留变化范围为0.68～1.47mm。【结论】冬小麦抽穗前,冠层存储能力与植株鲜重呈线性正相关关系;从拔节期开始,冠层存储能力随叶面积指数(LAI)和株高的增大而线性增大。喷灌强度对冠层存储能力没有明显影响。
[Objective] Indoor experiments were conducted to investigate canopy interception and its influence factors under sprinkler irrigation during two growing seasons of winter wheat （2003-2004 and 2004-2005）. [Method] In the experiments, canopy storage capacity （Cs） was measured using a weighing method. [Result] The experimental results demonstrated that the amount of water intercepted by canopy rapidly increased with water application at the initial stage of an irrigation event, and then reached the canopy storage capacity gradually. A varying canopy storage capacity was observed during the growing season, increasing linearly with fresh weight of winter wheat plants before the tasseling. Winter wheat canopy interception varied from 0.68 to 1.47 mm under normal plant intensity. [ Conclusion] Cs increased linearly with leaf area index （LAI） and plant height from the jointing to the mature of winter wheat. Sprinkler application rate had an insignificant effect on Cs.
出处
《中国农业科学》
CAS
CSCD
北大核心
2006年第9期1859-1864,共6页
Scientia Agricultura Sinica
基金
国家自然科学基金项目(50179037)资助
关键词
喷灌
冬小麦
冠层截留
冠层存储能力
Sprinkler irrigation
Winter wheat
Canopy interception
Canopy storage capacity
