摘要
中国东北典型黑土区农业小流域的微地形特征对土壤物理特性、作物初期生长呈现显著影响。研究将东北黑土区典型农业小流域划分为3类典型景观地块:坡顶高地、坡地和坡底洼地,跟踪了流域内不同景观地块土壤物理性质时空差异及其对大豆(Glycine max)籽粒萌发和初期生长的影响。结果表明:播种后洼地土壤耕作层土壤回温较慢,大豆籽粒萌发和幼苗高度以及发芽率明显低于坡顶高地。流域内3类典型地块的土壤容重和土壤水分在时间和空间上存在显著差异(P<0.05)。研究结果可为流域尺度农田生态系统空间差异管理的理论框架提供数据支持。
Topographical micro-climate has significant effects on soil properties and crop growth in a small typical agricultural watershed of the Mollisol（ fertile black soil）region located in the Northeast China. The quantitative characterization of spatio- temporal variability in soil properties and crop growth is an important component for successful precision-agriculture applica- tions and optimization managements, and is essential to improve the resources utilization efficiency. This paper presented the spatial differences of soil physical properties, soybean[ Glycine max（ L. ） Merr. ] seed germinations and the initial stage growth in the selected watershed. The watershed was divided into three parts including lowlands, slope-lands and highlands according to the terrain landscapes. Effects of the topographical micro-climate on soil properties and crop growth were significantly differ- ent in the study. The soil temperature and soil wanns up in the lowlands was significantly lower and slowly than that in high- lands and slopelands. Based on the research results, we discussed reasonable methods and agricultural management practices with temporal-spatial perspectives to improve the soil physical quality and water environment, and proposed a theory of spatial heterogeneity of differential management in agricultural ecosystems.
出处
《大豆科学》
CAS
CSCD
北大核心
2013年第2期185-188,共4页
Soybean Science
基金
国家自然科学基金(31100329)
湖南农业大学青年基金(62020111031)
湖南省教育厅优秀青年基金(12B059)
关键词
小流域尺度
黑土区
土壤物理性质
大豆
Small watershed scale
Black soil area
Soil physical properties
Soybean（ Glycine max）
