摘要
以滴灌为条件设置不同水肥处理,研究水氮耦合对枣树生长与产量的影响。结果表明:在年生长周期内枣树枝干生理生长在夏季最快,叶片生理生长在春季最快;在设计水平范围内,土壤中增施氮肥和增加灌水量均能促进枣树基径、树高和梢条的生长发育,提高叶面积指数,但会一定程度上降低叶片厚度和叶绿素含量;另外,增加土壤含水量还会降低枣树果实的单果重和果形指数;通过模型建立与分析,二因素对枣树产量的作用顺序为:施氮量>灌水量,水氮对产量具有协同效应,以枣树产量为目标,推荐灌水量和施氮量分别为:5 250～6 000m3/hm2和300～375kg/hm2。
Different treatments of water and fertilizer were designed under drip irrigation to study growth and yield of Zizyphus Jujube under coupling of water and nitrogen.The results show that the physiology growth of branches is the fastest in summer in the annual growth cycle of jujube tree,but the physiological growth of leaves is the fastest in spring.It can promote growth and development of base diameter,tree height and shoot of jujube tree to irrigate more water and apply more N to soil in the range of designed level;and it can also increase LAI,but can reduce the leaf thickness and chlorophyll content;in addition,it can reduce the single fruit weight and fruit shape index to irrigate more water to soil.Through the establishment and analysis of model,the role of water and N in yield of jujube tree is in order of Nwater.The interaction effect of water and N is coordination for yield.The quantity of watering is 5 250~6 000 m3/hm2,and the application quantity of N is 300~375 kg/hm2 by considering the yield as optimal composite scheme.
出处
《水土保持研究》
CSCD
北大核心
2012年第2期201-204,209,共5页
Research of Soil and Water Conservation
基金
自治区科技攻关(含重大专项)和重点项目计划课题"果树营养特性与水肥耦合技术研究"(200731136-5)
新疆农业大学草业与环境科学学院青年教师科研启动基金资助
土壤学自治区重点学科资助
关键词
滴灌
水氮耦合
枣树
长势
产量
drip irrigation
coupling of water and N
Zizyphus Jujube
growth
yield
