植物营养与肥料学报2010,16(3)：752-757 Plant Nutrition and Fertilizer Science
不同施肥制度对双季稻氮吸收、净光合速率
及产量的影响
王卫1,2，谢小立1*，谢永宏1，陈惟财3
（1中国科学院业热带农业生态研究所，亚热带农业生态过程重点实验室，潮南长沙410125；2中国科学院研究生院，北京100049；
3惠州大亚湾经济技术开发区科学发展研究中心，广东惠州516081）
摘要：利用稍田长期施肥制度定位试验，研究了不同施肥处理对水稽氮素吸收、净光合速率及产量的影响。有机物还田能显若促进水稻分葉、提高有效穗数和叶面积指数。只施用NPK，在分案后早稍叶片氮含量急剧下降，与早稻相比，而晚稽的稳肥促进了后期的氟吸收。在CK和施加NPK的基础上秸秆还田明显改善水韬中后期的氮吸收，但对晚稻的效应明显低于对早稍的效应。各处理的叶片以及稻穗氮含量晚稍明显低于早稍。叶片氮含量与叶片净光合速率成显著（早稍r=0.664")或极显菩正相关（晚r=0.704），这说明叶片氮含量缺乏降低了叶片光合能
力。有机物还田增产效果显养，在中等施肥水平时，有机物还田可以代替1/3以上的NPK投入。关键词：施肥：氮吸收；净光合速率；产量
中围分类号：S511.4*2.062
文献标识码：A
文章编号：1008505X(2010)03-0752-06
Effects of different fertilization on nitrogen uptake,
net photosynthesisrate and yield of rice WANC Weil. 2, XIE Xiao-lil', XIE Yong-hong", CHEN Wei-eai?
(I Key Laboratory of Agro-ecological Processes in Subropical Region, Institute of Subtropical Agriculture,
Chinese Academy of Sciences, Changsha, Hunan 410125, China;
2 Graduale School of Chinee Academy of Sciences, Beijing 100049, China;
3 Research Center of Huishou Dayasean Economic & Technological Derelopment Zone,Huizhou, Guangdong 516081, Chine)
Abstract : The effects of different fertilization on nitrogen uptake, net photosynthesis rale and yield of rice were studied in a long-term positioned fertilization experimental field. The results show that the number of tillers, panicles per unit area, LAI, and grain yield of rice are obviously increased under the organic materials retuming fertilization, Under the NPK ferilization, the content of nitrogen in leaves is declined sharply afer the tillering stage of early rice, while the earing fertilization of late rice could increase the nitrogen uptake in the late period. Organic materials retuming fertilization could improve nitrogen uptake in the mid-late period. But the effect on early rice is obviously better than that on late rice. The contents of nitrogen in leaves and grains of early rice are higher than those of late rice. There is a significantly positive correlation between net photosynthetic rate and content of nitrogen in leaves (early rice, r = 0.664' ; late rice r = 0.704** ), which indicates that the lack of nitrogen in leaves could decrease the net photosynthetic capacity. Organic aaaareesea als retuming fertilization could reduce more than 1/3 of NPK using.
Key words: fertilization; nitrogen uptake; net photosynthesis rate; yield
收稿日期：2009-0420
接受日期：2009-12-10
基金项目：国家"973"计划项月(2005CB121106)资助。
作者简介：王卫(1981—），男，安微怀选人，博士研究生，主要从事水帮生理生态研究。E-mail：vi-king@126.com
·通讯作者E-mail；x@isa.se.en
万方数据