摘要
当地当量比是耕作学中的重要概念，目前仅在间混作中初步应用，且不同教材看法不一。本文在分析间混作土地当量比应用现状的基础上，揭示了土地当量比的实质，对不同复种方式土地当量比的定义、计算公式及其应用进行了阐述，对土地当量比的意义进行了讨论。
Land equivalent ratio (LER) is an important concept in farming system. So far, it was used in inter cropping and there were different opinions in different references. This paper, on the basis of analysing of LER, reveals it's essence, proposes it's definition and formula. The theoretical sense are discussed in this paper.
出处
《沈阳农业大学学报》
CAS
CSCD
1998年第3期220-223,共4页
Journal of Shenyang Agricultural University
关键词
土地当量比
种植制度
复种
复种当量
land equivalent ratio
farming system
sequential cropping
