| Effect of tillage and seeding methods on grain filling and yield of winter wheat |
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| DOI：10.7606/j.issn.1000-7601.2017.04.32 |
| Key Words: tillage and seeding methods winter wheat grain filling characteristics yield |
| Author Name | Affiliation | | ZHAI Yun-long | College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China；College of Plant Science, Tarim University, Alaer, Xinjiang 843300, China | | WEI Yan-hua | College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China | | ZHANG Hai-lin | College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China | | CHEN Fu | College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China |
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| Abstract: |
| In order to providing theory basis for suitable agricultural measures of different tillage and seeding methods，the effect of tillage and seeding methods on grain filling characteristics and yield of winter wheat was discussed. In the field experiment from September 2011 to June 2012, we compared the effects of no tillage with row planting(NTS), subsoiling tillage with row planting (DTS), mechanical broadcast sowing (BSS), and rotary tillage with row planting (RTS) on grain filling characteristics, under the conditions of same sowing date. Logistic equation was used to characterize grain filling process. The result showed that the R square value of equation fitting coefficient reached a highly significant level above 0.9942. This indicated that the logistic equation could truly reflect the process of grain filling. Tillage and seeding methods influenced grain filling process significantly. There were no obvious differences of grain filling rate (GFR) between BSS and RTS treatment because of the same depth of tillage. The GFR of these two treatments in the gradual increasing-stage, rapid increasing-stage and slow increasing-stage, were lower than the NTS and DTS treatment. There was a marked difference of plant and row allocation between the BSS and RTS treatment. The gradual increasing-stage GFR of BSS was higher than RTS, and the GFR of rapid increasing-stage and slow increasing-stage were lower than it. But the grain filling duration (GFD) of BSS during each stage was 0.05, 0.57 d and 0.71 d longer than RTS. Tillage and seeding methods mainly affect the grain weight through GFR and GFD. The tillage affects the GFR most, and the plantation spacing affects GFD. The tillage affects the grain filling of superior and inferior grains differently, and the BSS treatment for the superior grains, the grain weight was higher with higher GFR 0.95 milligram per day per kernel at the slow growth period, and GFD only reached 9.95 day, the GFR at both rapid growth period and slow growth period of the grain filling reached 2.11 and 0.59 mg per day per kernel, whereas the GFD reached 12.27 and 15.27 day, while the 1000-kernel weight of superior grains reached 41.65 g. Although 1000-kernel weight for the superior and inferior grains were only 40.2 g, the plantation mode was of higher effective panicles number and the economic yield come to 7 599.0 kg per hectare. |
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