不同耕作措施对微环境变化的影响  

EFFECTS OF DIFFERENT TILLAGE ON THE MICRO-ENVIRONMENTAL VARIATION

作　　者：李洪勋[1] 吴伯志[2] 

机构地区：[1]贵州省烟草科学研究所中国烟草西南农业试验站,贵州贵阳550003 [2]云南农业大学,云南昆明650201

出　　处：《核农学报》2005年第4期269-273,326,共6页Journal of Nuclear Agricultural Sciences

摘　　要：用滇丰4号玉米做材料研究了4个栽培处理(A、B、C、D)在3个坡度(3°、10°和27°)上种植玉米微环境的变化。结果表明B处理(沿等高线+薄膜覆盖+秸秆覆盖+开沟种植)效果最佳:B处理构建了高产玉米冠层的微环境特性和冠层结构,并改善了叶片光合特性。生育期间3个坡度上B处理的平均细胞间隙CO2浓度始终大于对照(处理D),2002年平均比对照增加39.37%,2003年增加36.78%。2003年9月2日光合速率在12:00时,处理B比对照增加24.35%。经相关分析可知,各个坡度总体上玉米叶片净光合速率与蒸腾速率呈显著正相关关系。Field experiments were carried out to study the effects of cultivation treatments （A, B, C, D） in slope lands（3°, 10°and 27°）on micro-environmental changes of planted corn （Dianfeng 4）. The results showed that treatment B （contour ＋ polythene mulch ＋ straw mulch ＋ furrow planting） provided the best micro-environment, with a high yield canopy and canopy structure, an improved photosynthesis characteristic of corn leaves. The intercellular CO2 concentration of treatment B in three slope（3°, 10°and 27°） was higher compared with control D, the increasement was 39.37% in 2002, and 36.78% in 2003. The diurnal net photosynthetic rate for treatment B at 12：00 , Sep.2, 2003, was increased by 24.35% . The correlation coefficient indicates a positive relation of the net photosynthetic rate and transpiration rate for different slope cand.

关 键 词：耕作措施 玉米 微环境变化 环境变化 叶片净光合速率 玉米冠层 CO2浓度 正相关关系 材料研究 滇丰4号 

分 类 号：S341[农业科学—作物栽培与耕作技术]