| Cite this article: | 范海燕,潘兴瑶,胡秀君,等.基于主成分分析的露地白萝卜滴灌施肥制度研究[J].灌溉排水学报,2021,():-. |
| fanhaiyan,Pan Xingyao,Hu Xiujun,et al.基于主成分分析的露地白萝卜滴灌施肥制度研究[J].灌溉排水学报,2021,():-. |
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| Study on Drip Irrigation and Fertilization System of White Radish in Open Field Based on Principal Component Analysis |
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fanhaiyan1, Pan Xingyao1, Hu Xiujun2, Liu Honglu1
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1.Beijing Water Science and Technology Institute;2.Zhejiang University of Water Resources and Electric Power
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| Abstract: |
| In this paper, the white radish in open field was used as the test material to carry out experimental research.In the experiment, the effects of water and nitrogen coupling on chlorophyll content, yield, quality, water production efficiency, partial productivity of nitrogen fertilizer and water consumption of white radish leaves were observed and analyzed by setting different irrigation and nitrogen application treatments. The optimal drip irrigation and fertilization system of white radish in open field was determined by principal component analysis aiming at saving water and saving fertilizer with high quality and high yield.The results show that:The effect of irrigation and nitrogen application on chlorophyll content of radish leaves in open field was significant, but the interaction of water and nitrogen did not have a significant effect, and the growth effect of chlorophyll content in leaves treated with high water and fertilizer was obvious.Irrigation water, nitrogen, and nitrogen interactions on green radish quality, yield, water use efficiency were not significant, the influence of nitrogen on bai luobo nitrogen partial productivity reached extremely significant level, the influence of nitrogen partial productivity to W2N1 processing is the largest, weaker than other nitrogen treatment of nitrogen productivity increased by 2% ~ 57%, and the results show that water treatment can improve the high green radish fertilizer use efficiency. During the whole growth period, the water consumption of each treatment was 303.12~329.72mm, the average daily water consumption intensity was 4.10 ~4.46 mm/d, and the value range of crop coefficient was 1.39~1.51. The variation trend of water nitrogen treatment on crop coefficient, water consumption and average daily water consumption intensity was consistent. Outdoor fertigation system is presented by principal component analysis, the autumn crop irrigation water 85% ET0, suitable appropriate n application rate of 255 kg/hm2, of which 443 kg urea/hm2 (204 kg/hm2 nitrogen), high k 319 kg/hm2 (51 kg/hm2 nitrogen), in foliar fertilizer period exuberant growth period fertilizer fertilizer from the 1, fleshy root growth stage two, crop coefficient is 1.46, in the whole stages of the crop coefficient values can be used as irrigation and water conservancy engineering design and management of the reference. |
| Key words: White radish; Production; Quality; Water production efficiency; Partial productivity of nitrogen fertilizer; Principal component analysis |
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