陕西农田杂草种质资源及生态学研究  

The Germplasm of Weeds in Crop Field and the Ecological Research in Shaanxi Province

作　　者：贺学礼[1] 赵丽莉[1] 陈鹏 

机构地区：[1]西北农业大学基础科学系

出　　处：《西北农业学报》1997年第1期84-87,共4页Acta Agriculturae Boreali-occidentalis Sinica

摘　　要：陕西农田杂草种质资源丰富，共有５４科，２０３属，３３２种。旱田杂草季相变化明显，与气候的季节性及耕作制度密切相关，分为小麦＋早春性杂草和玉米＋晚春性杂草２个阶段。其早期生长与作物对水分、养分的竟争作用强烈。区系成分以温带分布为主，世界分布和热带分布占相当比例，在属级水平上有地中海、中亚及东亚成分的渗入。The germplasm of weeds in crop field are rich in Shaanxi province and there are 332 species belonging to 203 genera of 54 families. The seasonal change of weed communties in the upland fields was clear, it could be divided into two types:(1) wheat +earlyspring weeds and (2) maize + latespring weeds phase. This seasonal change was related to climatic seasonal change and human cropping systems. In the early period of crop growth the competition between weeds and crops to water and mineral nutrition were intense. The flora compositions were diversified mainly with the temperate distribution and worldwide and tropic elements repesented rather large proportion. Mediterranean、Central Asia East Asia flora elements intruded into the category of genera.

关 键 词：杂草 种质资源 季相变化 陕西 

分 类 号：S451.2[农业科学—植物保护]