断根深度对花生叶片氮代谢特性及产量的影响  

Root cutting depth effects on nitrogen metabolism of leaves and peanut yield

作　　者：高祺[1] 张晓军[1] 冯锴[1] 赵长星[1] 王铭伦[1] 王月福[1] 

机构地区：[1]青岛农业大学农学与植物保护学院山东省旱作农业技术重点实验室,山东青岛266109

出　　处：《中国油料作物学报》2015年第3期316-321,共6页Chinese Journal of Oil Crop Sciences

基　　金：国家自然科学基金(31271657);国家花生产业技术体系项目(Nycytx-19);山东省花生现代产业技术体系项目(SDAIT-05-011-06);山东省高校旱作节水优秀创新团队项目

摘　　要：采用箱栽和田间试验相结合的方法,研究了断根深度对花生叶片氮代谢特性及产量的影响。结果表明：各断根深度在断根后初期（5~10d）均造成叶片含氮量、氮积累量、可溶性蛋白质含量和硝酸还原酶活性降低,并随着断根深度的增加降低幅度增大;10~15d之后则随着断根深度的增加呈升高的趋势,以断根深度15cm处理的叶片含氮量、氮积累量、可溶性蛋白质含量和硝酸还原酶活性最高。适度断根处理（10~15cm）显著提高花生产量、有效果数和百果重。过度断根处理的叶片含氮量、氮积累量、可溶性蛋白质含量和硝酸还原酶活性则一直低于对照处理。表明适度断根处理短时间内降低了花生叶片氮代谢水平,但之后能够延缓花生叶片氮代谢水平的下降速度,保持生育后期叶片具有较高的氮代谢水平,增加生物产量、荚果产量、有效果数和百果重。花生的适宜断根深度为10~15cm。Effect of root cutting levels on leaves nitrogen（N）metabolism and peanut yield were investigated in filed and box culture in 2012 - 2013. Results showed that,N content,N accumulation,soluble protein content and nitrate reductase activity of leaves decreased early after root cutting. The decrease was accelerated by root cut-ting depths. After 10d to 15d,the above index began to increase gradually especially in the level of 15cm,al-though they were still lower than that of control. Moderate root - cutting（10 - 15cm）resulted in significantly high-er biological and pod yield,as well as significantly higher valid pods and 100 - pod weight. It indicated that root -cutting affected N metabolism only in a short period of time,and delayed its declining during late growth stages. This research suggested that moderate depth of root - cutting was between 10 cm to 15 cm.

关 键 词：断根深度 花生叶片 氮代谢 产量 

分 类 号：S565.201[农业科学—作物学]