摘要
由于自然和人为因素,营养斑(nutrient patch)在土壤中是普遍存在的。从70年代以来,国外就通过各种模拟方式对土壤中营养斑进行了大量的研究,尤其以对氮营养斑研究居多。研究表明:氮营养斑对新生根系的繁殖影响较为明显,但不同植物反应不一样,影响机理还不很清楚。营养斑也是生物活性较强、种群数量较多区域,在养分循环体系中起着特殊作用。营养斑对土壤的理化性质和生物性质可能有很大的影响,但这方面的研究很欠缺。本文主要对土壤中氮营养班的研究进展做一综述。
Due to natural and man-made effects, nutrient patches generally exist in soil. From 1970s, many researches on nutrient patches have been conducted by various simulating methods in abroad, especially to nitrogen nutrient patch. The results indicated that nitrogen nutrient patches significantly affected proliferation of primary root, but the responses varied with plant species. The mechanism wasn't clear. In soil, any nutrient patch was a zone of increased microbial activity and population number, which had special role in nutrient cycles. Nutrient patch may also affect physical, chemical and biological properties of soil, but researches on those were few. This article briefly reviewed research progress on nitrogen nutrient patch.
出处
《干旱地区农业研究》
CSCD
北大核心
2003年第2期45-49,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金(40071053)
中国科学院生态环境研究中心知识创新工程课题(RCEES99014)
