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- Title
减氮配施有机肥对滴灌春小麦花后同化物转运和籽粒灌浆特性的影响.
- Authors
欧阳雪莹; 罗玉琴; 蒋桂英
- Abstract
【Objective】 Drip irrigation wheat is a cultivation model of efficient use of water and fertilizer for densely planted crops, and is the main cultivation technology of wheat in Xinjiang. This project aims to investigate the regulation methods of high efficiency and high yield of nitrogen in drip irrigation wheat in Xinjiang under nitrogen reduction conditions by setting different nitrogen reduction and organic fertilizer treatments, research the regulation effects on the post-flowering assimilates transport and grain filling characteristics of spring wheat under drip irrigation in the hope of providing scientific basis for the high yield and quality cultivation for drip irrigation spring wheat in Xinjiang.【Method】 The split-plot designs were adopted, nitrogen was taken as the main plot, and the variety as the subplot; in 2019, seven levels of nitrogen reduction combined with organic fertilizer application (NCK、N5、N10、N15、N20、N25、N0) were set to compare and analyze the changes of the post-flowering assimilate transport and grain filling characteristics of strong gluten wheat Xinchun 38 and medium gluten wheat Xinchun 49 under different nitrogen reduction and organic fertilizer treatment conditions.【Result】 During the filling period, the dry matter (stems and leaves) after anthesis showed an upward trend and then a downward trend with the advance of the filling period, the peak appeared at 14 days after anthesis, and the dry matter of ear showed gradually increasing trend. With the increase of nitrogen reduction and organic fertilizer application, the post-flowering dry matter accumulation, post-flowering dry matter transfer rate, post-flowering contribution rate, grain weight and grain filling parameters of the two varieties showed a trend of first increasing and then decreasing. The indicators reached the optimal value at N15 treatment, specifically expressed as N15>N20>N25>N10>N5>NCK>N0, and the difference between different treatments was significant (P<0.05). The filling parameters were closely related to the grain weight. The correlation analysis showed that there was a significant relationship between the rapid accumulation duration (t2-t1), average filling rate (Vmean), maximum filling rate (Vmax) and grain weight of the two varieties. Path analysis showed that the direct effect between the average filling rate and grain weight was the largest. The direct path coefficients of the two varieties were 1.034,7 and 0.957,3.Under N15 treatment, Vmean increased by 1.92%-30.58% (Xinchun38) and 1.02%-27.93% (Xinchun 49) compared those with other treatments.【Conclusion】 Under the treatment of nitrogen reduction and organic fertilizer application, the dry matter accumulation, post-flower transport rate and contribution rate of N15 treatment (85% N 15% organic fertilizer) are the highest, and the grain weight is the highest under this treatment, and the related grouting parameters are the best, that is, N15 treatment is the optimal proportion combination in this experiment.
- Publication
Xinjiang Agricultural Sciences, 2021, Vol 58, Issue 6, p987
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2021.06.002