| Effects of different patterns of plastic film mulching in autumn on soil moisture and photosynthetic characteristics of spring maize in the semi-arid regions |
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| DOI：10.7606/j.issn.1000-7601.2017.02.07 |
| Key Words: spring corn film mulching in autumn soil moisture photosynthetic characteristics yield |
| Author Name | Affiliation | | ZHANG Chao | College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China；Institute of Water-Saving Agriculture in Arid Areas of China, Northwest A & F University, Key Laboratory of Crop Physi-ecology and Tillage in Northwestern loess Plateau, Minisry of Agriculture, Yangling, Shaanxi 712100, China | | WU Yang | Institute of Water-Saving Agriculture in Arid Areas of China, Northwest A & F University, Key Laboratory of Crop Physi-ecology and Tillage in Northwestern loess Plateau, Minisry of Agriculture, Yangling, Shaanxi 712100, China；College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | HUANG Fang-yuan | College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China；Institute of Water-Saving Agriculture in Arid Areas of China, Northwest A & F University, Key Laboratory of Crop Physi-ecology and Tillage in Northwestern loess Plateau, Minisry of Agriculture, Yangling, Shaanxi 712100, China | | JIA Zhi-kuan | Institute of Water-Saving Agriculture in Arid Areas of China, Northwest A & F University, Key Laboratory of Crop Physi-ecology and Tillage in Northwestern loess Plateau, Minisry of Agriculture, Yangling, Shaanxi 712100, China；College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | CAI Tie | Institute of Water-Saving Agriculture in Arid Areas of China, Northwest A & F University, Key Laboratory of Crop Physi-ecology and Tillage in Northwestern loess Plateau, Minisry of Agriculture, Yangling, Shaanxi 712100, China；College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | REN Xiao-long | Institute of Water-Saving Agriculture in Arid Areas of China, Northwest A & F University, Key Laboratory of Crop Physi-ecology and Tillage in Northwestern loess Plateau, Minisry of Agriculture, Yangling, Shaanxi 712100, China；College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| With the purpose of promoting rainfall utilization efficiency and mitigating spring drought, the effects of plastic film mulching in autumn on soil moisture, photosynthetic indexes and fluorescence parameters in functional leaves and grain yield of spring corn were studie. Two different patterns of plastic film mulching in autumn-all film mulching in autumn (PA) and ridge and furrow planting of semi-film mulching in autumn (RH)-were tested in the semi-arid areas in Northwest. Corn plants with no mulching cover(CK) served as control. Results showed that water storage within 0～100 cm soil of the two different patterns of plastic film mulching in autumn increased significantly, compared with CK. In the spring of severe drought in 2013, soil water storage in the treatment of PA and RH increased by 26.15% and 13.40%, respectively. In the spring of rain and snow in 2014, soil water storage in the two patterns of plastic film mulching increased by 10.44％ and 11.20％. The net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs) and chlorophyll fluorescence parameters(Fm, Fv/Fm, Fv/F0 and qP) of corn functional leaves in treatment PA and treatment RH were all higher than those in control in 2013 and 2014 (the rate of increase in these parameters was higher in 2014 than in 2013). The corn grain yield of PA and RH increased by 40.98% and 25.83% respectively, and 74.60%, 48.64% in 2014.Water production efficiency of PA and RH increased by 29.70% and 22.87% in 2013 respectively, and 64.87%, 47.08% in 2014. The results also showed that different patterns of plastic film mulching in autumn in the semi-arid areas of Northwest promoted the photosynthetic performance of leaves, and significantly increased grain yield and water use efficiency of corn, which was particularly evident in the drought year, and the all film mulching in autumn was the optimal cultivating model in the semi-arid region of Northwest and it was better than ridge and furrow planting of semi-film mulching in autumn. |
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