| Effect of straw mulching on grain filling dynamics of winter wheat and yield in dryland |
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| DOI：10.7606/j.issn.1000-7601.2010.02.07 |
| Key Words: straw mulching grain filling dynamics winter wheat Weibei dryland |
| Author Name | Affiliation | | LIU Ting | Research Center of Agriculture in the Arid and Semiarid Areas, Northwest A&F University, Key and Open Laboratory of Crop Production and Ecology in Arid Areas, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | JIA Zhikuan | Research Center of Agriculture in the Arid and Semiarid Areas, Northwest A&F University, Key and Open Laboratory of Crop Production and Ecology in Arid Areas, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | ZHANG Rui | Research Center of Agriculture in the Arid and Semiarid Areas, Northwest A&F University, Key and Open Laboratory of Crop Production and Ecology in Arid Areas, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | ZHENG Jiacheng | Research Center of Agriculture in the Arid and Semiarid Areas, Northwest A&F University, Key and Open Laboratory of Crop Production and Ecology in Arid Areas, Ministry of Agriculture, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A field experiment including straw mulching in different amounts was set in Weibei Loess Plateau of Shaanxi Province to make clear the effect of straw mulching on grain filling and yield of winter wheat from Sept. 2007 to Jun. 2008. The quantity of straw mulching had four levels of 9 000 kg/hm2 mulching（SM9）, 6 000 kg/hm2 mulching（SM6）， 3 000 kg/hm2 mulching（SM3）and non mulching(CK). The results indicated that in the slightly increasing stage, the grain filling rate of four treatments decreased gradually in the following order: CK, SM3, SM6 and SM9; However, in the fast and the slowly increasing stage, the grain filling rate of control was different with the slightly increasing stage.The grain filling rate can be arranged in the following order as SM3>SM6>CK>SM9. The grain filling duration of SM9 was longer than contrast's 6d, SM6 and SM3's grain filling duration were almost the same as control's. During the fast and the slowly increasing stage, the contribution rate of SM9, SM6 and SM3 were all larger than control's, while in contrary for the slightly increasing stage. Compared with control, the amounts of 3 000 kg/hm2 could increase winter wheat yields after one year coverage.The SM3 treatment increased significantly 5.9% than control's. According to the research, SM3's production increase was mainly due to the grain filling rate was higher than control's in the fast and the slowly increasing stage. |
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