摘要
通过田间试验对不同施肥水平下太湖地区黄泥土壤水稻的氮肥吸收规律和氮肥利用效率进行了研究，并应用^13N微区试验测定不同氮肥水平下氮肥损失数量。在此研究数据基础上，引入数学的微积分原理和环境经济学的Coase原理，对该地区水稻田氮肥施用的经济效益和环境效益进行评价，求得219-255kghm^-2为太湖地区黄泥土上目前生产条件下，兼顾生产、生态和经济三效益比较合理的水稻施肥量，相应的经济、生态适宜产量为8601—8662kg hm^-2。
The roles of nitrogen absorption and nitrogen utilization efficiency under different fertilizer rates were studied in a field experiment involving Taihu Lake region Fe-leaching-Stagnic Anthrosols. The 15N tracer technique was also employed to reliably calculate the amount of nitrogen loss. We measured rice yields, nitrogen utilization efficiencies, and the amounts of nitrogen loss under different levels of application of nitrogen fertilizer in the paddy field. The economic benefit and environmental benefit were evaluated with the data obtained from the experiment. In accordance with the calculus theory of mathematics and the Coase Theorem of Environmental Economics, the results showed that the ecologically and economically appropriate amoiant of nitrogen fertilizer for producing rice in this area was in the range： 219 - 255 kg·hm^-2, and the corresponding economic and ecological yield was in the range： 8600 --8661 kg hm^-2 using current agricultural production technology.
出处
《生态学报》
CAS
CSCD
北大核心
2007年第2期588-595,共8页
Acta Ecologica Sinica
基金
中国科学院知识创新工程资助项目(KZCX2-413-3)
国家自然科学基金重大资助项目(30390080)
国家重点基础研究发展计划(973计划)资助项目(2005CB121108)~~
关键词
氮肥吸收利用
^15N示踪技术
经济生态施氮量
Nitrogen absorption and utilization
15N tracer technique
Economically-ecologically appropriate amount ofnitrogen fertilizer applied, Coase Theorem
