| Cite this article: | 呼红伟,蔡焕杰.不同氮肥条件下补充灌溉对冬小麦生物量、WUE、产量的影响[J].灌溉排水学报,0,():-. |
| Hu Hongwei,CAI Huanjie.不同氮肥条件下补充灌溉对冬小麦生物量、WUE、产量的影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Effects of supplementary irrigation on biomass , WUE and yield of winter wheat under different nitrogen fertilizer conditions |
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Hu Hongwei1,2, CAI Huanjie1,2
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1.Northwest A&2.F University
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| Abstract: |
| Abstract: [Objective] In order to promote the efficiency of irrigation and fertilization in agriculture, this study carried out experiments on physiological regulation of irrigation and fertilizer on crops, carried out irrigation tests under different coupling of irrigation and fertilizer, measured the growth indexes of winter wheat, and preliminarily explored a reasonable irrigation and fertilizer interval suitable for high yield of winter wheat in guanzhong area of Shaanxi province. [Methods] Set N application rate of irrigation frequency and the two factors, irrigation frequency is no irrigation (I0) in the whole stages respectively, jointing stage time (I1), heading stage and filling stage (I2), jointing stage and heading stage (I3), each jointing stage and heading stage and mature stage irrigation (I2), N application rate is set to 75 kg/hm2 (F1), 150 kg/hm2 (F2), 300 kg/hm2 (F3). [Results] 1: Irrigation treatment has an extremely significant positive correlation with crop water consumption, and it increases with the increase of irrigation water volume. Upland cultivation increases the absorption and utilization of soil water storage by crops, and frees up corresponding soil water storage capacity after harvest. Fertilization has a positive correlation with soil water consumption, but it is not significant. 2: Under the same irrigation processing, the quality of winter wheat aboveground dry matter in each growth period were showing high fertilizer >middle fertilizer> low fertilizer, increasing nitrogen can significantly increase the dry matter weight of the earth, under the same nitrogen level processing, quality of the dry matter production of the growth period increases with the increase of irrigation water, and replenishing the filling water has a significant positive effect on increasing the quality of dry matter. 3: Irrigation has an extremely significant impact on winter wheat yield, has no significant impact on WUE, but there is a positive correlation. Fertilization has no significant impact on yield, but there is a positive correlation and an extremely significant positive correlation on WUE. The yield of F1I0 treatment was 3728.00 kg/hm2, and the maximum yield of F3I4 treatment was 5905.90 kg/hm2, which was 58.42% higher than that of F1I0 treatment.WUE of F2I1 treatment was 1.88 kg/m3, 48.77% higher than that of F1I0 treatment. [Conclusion]: under the conditions of this test, nitrogen application of 150 kg/hm2 and supplementary irrigation at jointing stage (F2I1) are relatively appropriate and effective irrigation and fertilizer management measures in guanzhong area of Shaanxi province |
| Key words: supplementary irrigation；yield；WUE；biomass |
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