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| Experimental study on fertilizer effect of Tartary Buckwheat ″3414″ in agricultural area of Lhasa River Valley |
| BIANBADROLMA1,2* |
| 1. Research Institute of Agricultural Resource and Environment, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850032, China; 2. State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Lhasa, Tibet 850032, China |
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Abstract In order to explore the impact of different fertilization combinations on the yield of Tartary Buckwheat in alpine and dry farming areas and realize the optimal fertilization method and fertilization combination under the goal of optimal yield of Tartary Buckwheat, on the one hand, the yield of Tartary Buckwheat is improved, on the other hand, the application of fertilizer is reduced, so as to reduce the non-point source pollution of farmland. In this study, combined with the planting and fertility cha-racteristics of Tartary Buckwheat in the Lhasa River Valley, the ″3414″ fertilizer effect experiment was made to establish the fertilizer effect equation and explore the best fertilization mode and the optimal fertilizer ratio of Tartary Buckwheat. The results showed that there were significant differences in the yield performance of Tartary Buckwheat by different fertilization modes. Among them, the yield performance of Tartary Buckwheat was the highest under N2P2K3(nitrogen content 34.5 kg/hm2, phosphorus content 36 kg/hm2, potassium content 30 kg/hm2). The analysis of fertilizer interaction effect showed that the interaction effect of N and P was the highest, and the order of soil nutrient limiting yield was N>P>K. Through the analysis of the unitary quadratic fertilizer effect model, the optimal fertilization rates of Tartary Buckwheat were recommended, including urea application rate of 44.5 kg/hm2, calcium superphosphate application rate of 256.17 kg/hm2 and potassium sulfate application rate of 40.82 kg/hm2.
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Received: 28 November 2019
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