| Production of mixed planting winter wheat and soil water efficiency in Guanzhong Irrigation Zone |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2017.03.05 |
| Key Words: winter wheat mixture yield above-ground biomass water use efficiency |
| Author Name | Affiliation | | SHI Cheng-xiao | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | CHEN Ting | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | FENG Fan | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | WANG Chang-jiang | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | LV Xiao-kang | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHANG Lei | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | LIAO Yun-cheng | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | QIN Xiao-liang | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China |
|
| Hits: 1274 |
| Download times: 565 |
| Abstract: |
| The field experiments were conducted in 2013—2014 and 2014—2015 at Doukou Experimental Station of Northwest A&F University to explore effects of mixed planting of four cultivated winter wheat varieties (Xinong 979, Xiaoyan 22, Aikang 58 and Xinong 889) on population yield and water use efficiency. The above-ground biomass of population, grain yield, water use efficiency were determined with pure stands of each variety (1L), mixture of two varieties (2L), mixture of three varieties (3L) and mixture of four varieties (4L). Results indicated that the canopy light interception rate, flag leaf SPAD value, net photosynthetic rate and instantaneous WUE of mixed population were significantly higher than those of monoculture group during filling period. Grain yield and above-ground biomass of mixed population were higher than those of monoculture group. The grain yield decreased with the increase in mixed level, and the average increase in two years were 7.92%(2L), 7.15%(3L) and 2.73%(4L) respectively, with the increase of 2L and 3L reaching significant level. Above-ground biomass showed an rising trend with the increase in mixed level , and the average increase in two years were 1.08%(2L), 4.78%(3L) and 7.24%(4L) respectively, with the increase of 3L and 4L reaching significant level. The increase in grain yield was attributed to the augment of spike number (per area) and kernel (per spike). Mixed planting increased water content of upper soil layer and root distribution in deeper soil layer, and significantly decreased water consumption of population during whole growth period. Besides, mixed planting improved water use efficiency(WUE), average WUE of grain in two years increased by 11.93%(2L), 12.39%(3L) and 8.72%(4L), and average WUE of above-ground biomass in two years increased by 3.3%(2L), 8.66%(3L) and 11.75%(4L) respectively. It is concluded that mixed planting of cultivated winter wheat varieties could increase grain yield with better water use efficiency. |
|
|
|