免耕和施肥对玉米光合速率的影响

依据在陕西安塞进行的田间试验,研究了黄土丘陵旱农区传统翻耕和免耕及化肥和有机肥对玉米光合速率和气孔导度的影响。结果表明,免耕措施下玉米的光合速率、气孔导度、水分利用效率均高于传统翻耕,气孔导度的日变化与光合速率显著相关。在黄土丘陵区实施免耕既有利于作物对有限降水的高效利用,提高作物产量,也可促进农田系统生产力可持续提高。

According to the filed experiments in Ansai,Shaanxi,this article referred to the influence of conventional tillage,no-tillage,fertilizer and organic fertilizer on photosynthesis and stomata conductance of maize in hilly and gully arid region of Loess Plateau.The result showed that the photosynthesis,stomata conductance and WUE of no-tillage practices were higher than conventional tillage.The photosynthesis was positively correlated with stomata conductance.