首页 | 官方网站   微博 | 高级检索  
     

施氮量和花后土壤含水量对小麦旗叶衰老及粒重的影响
引用本文:赵长星,马东辉,王月福,林琪.施氮量和花后土壤含水量对小麦旗叶衰老及粒重的影响[J].应用生态学报,2008,19(11):2388-2393.
作者姓名:赵长星  马东辉  王月福  林琪
作者单位:1. 青岛农业大学农学与植物保护学院,山东青岛,266109;中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京,100085
2. 青岛农业大学农学与植物保护学院,山东青岛,266109
基金项目:国家自然科学基金项目,博士后科学基金项目,国家粮食科技丰产工程资助项目
摘    要:在防雨池栽培条件下,研究了施氮量和花后土壤含水量对小麦旗叶衰老和粒重的影响.结果表明:各氮肥处理下,小麦旗叶SPAD值、可溶性蛋白质含量、超氧化物歧化酶(SOD)活性、过氧化氢酶(CAT)活性和光合速率(Pn)均表现为:花后土壤含水量60%~70%处理>80%~90%处理>40%~50%处理,小麦旗叶丙二醛(MDA)含量表现为:花后土壤含水量40%~50%处理>80%~90%处理>60%~70%处理,表明花后土壤含水量过高或过低均可导致小麦旗叶早衰,影响籽粒灌浆,降低粒重.在花后相同土壤含水量条件下,旗叶SPAD值、可溶性蛋白质含量、SOD活性、CAT活性和Pn均随施氮量的增加而升高,MDA含量随施氮量的增加而降低,表明增施氮肥可以延缓小麦旗叶衰老,但过量施用氮肥则不利于小麦粒重的提高,尤其是在花后土壤缺水的情况下,施用过多氮肥可导致小麦粒重下降.在小麦生产中可以将施用氮肥和控制花后土壤水分含量相结合,延缓小麦植株衰老,提高粒重.

关 键 词:小麦  施氮量  土壤含水量  衰老  粒重
收稿时间:2008-3-17

Effects of nitrogen application rate and post-anthesis soil moisture content on the flag leaf senescence and kernel weight of wheat.
ZHAO Chang-xing,MA Dong-hui,WANG Yue-fu,LIN Qi.Effects of nitrogen application rate and post-anthesis soil moisture content on the flag leaf senescence and kernel weight of wheat.[J].Chinese Journal of Applied Ecology,2008,19(11):2388-2393.
Authors:ZHAO Chang-xing  MA Dong-hui  WANG Yue-fu  LIN Qi
Affiliation:College of Agriculture and Plant Protection, Qingdao Agricultural University, Qingdao 266109, Shandong, China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Abstract:A rain-proof pool culture experiment was conducted to study the effects of nitrogen (N) application rate and post-anthesis soil moisture content on the flag leaf senescence and kernel weight of wheat. The results indicated that in all N fertilization treatments, the flag leaf SPAD value, soluble protein content, SOD and CAT activities, and photosynthetic rate decreased in the order of 60%-70% >80%-90%>40%-50% post-anthesis soil moisture content, while the MDA content decreased in reverse order, suggesting that over high or low post-anthesis soil moisture content could cause the early senescence of flag leaves, impact grain filling, and decrease kernel weight. Under the same post-anthesis soil moisture content, the SPAD value, soluble protein content, SOD and CAT activity, and photosynthetic rate increased, while the MDA content decreased with increasing N application rate, indicating that increased N fertilization could postpone the senescence of wheat flag leaves. However, over N application was not favorable to the increase of kernel weight, especially under the condition of post-anthesis soil moisture deficiency. It was concluded that appropriate N application and post-anthesis soil moisture content control could postpone the plant senescence and increase the kernel weight of wheat.
Keywords:
本文献已被 维普 万方数据 等数据库收录!
点击此处可从《应用生态学报》浏览原始摘要信息
点击此处可从《应用生态学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号