Effects of Different Tillage Patterns on Photosynthetic Characteristics and Yield of Wheat and Maize in Oasis Irrigation Area
In order to put forward a tillage pattern that is beneficial to the photosynthesis and yield formation of wheat and maize,field experiments were carried out in the oasis irrigation area of Hexi Corridor.Two tillage meth-ods(NT)and conventional tillage(CT)were set up,and three planting modes were wheat and maize intercropping(W/M),winter rape and maize rotation(W-G→M)after wheat interplanting,and wheat-maize rotation(W→M).The photosynthetic characteristics,chlorophyll content and yield of wheat and maize under different tillage patterns were determined.The results showed that compared with CT,the net photosynthetic rate,transpiration rate,stom-atal conductance and net photosynthetic rate of wheat in NTW/M were 54.96％,1.18％and 13.79％higher than that in CTW/M,respectively.The net photosynthetic rate and transpiration rate of maize with NTW/M were 53.19％and 25.99％higher than those with CTW/M,respectively.Compared with rotation,the net photosynthetic rate of NTW/M wheat was 34.81％and 32.73％higher than that of NTW-G→M and NTW→M,the stomatal con ductance was 1.02％and 35.62％higher,and the transpiration rate was 8.89％and 30.92％higher than that of NTW/M,respectively.Compared with CT,the chlorophyll content in leaf 4 and leaf 2 of NTW/M was 8.93％and 3.19％higher than that of CTW/M,respectively.The chlorophyll content of maize 4 and maize 2 was 20.79％and 7.97％higher than that of CTW/M,respectively.Compared with rotation,the chlorophyll content of wheat 4 and maize 2 was 8.33％and 2.10％higher than that of NTW-G→M,respectively.Compared with NTW→M,chloro-phyll content in 4 and 2 leaves of wheat was 10.33％and 12.55％higher,respectively.Compared with CT,wheat yield of NTW/M was 24.08％higher than that of CTW/M.The maize yield of NTW/M was 10.16％higher than that of CTW/M,and the wheat yield of NTW/M was 9.56％and 17.07％higher than that of NTW-G→M and NTW→M,respectively,compared with rotation.Therefore,NTW/M treatment is more conducive to photosynthesis of wheat and maize to achieve yield increase,which is a tillage pattern worthy of promotion in Hexi irrigation area.
NETL
NSTL
万方数据
维普
