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- W3150584789 abstract "In order to develop the optimal coupling model of water and nitrogen of watermelon under limited irrigation in gravel-mulched field,a field experiment with split-plot design was conducted to study the effects of supplementary irrigation volume,nitrogen fertilization,and their interactions on the growth,yield,quality and water and nitrogen use efficiency of watermelon with 4 supplementary irrigation levels(W:0,35,70,and 105 m·hm~(-2)) in main plots and 3 nitrogen fertilization levels(N:0,120,and 200 kg N·hm~(-2)) in sub-plots.The results showed that the photosynthetic rate,yield,and water and nitrogen use efficiency of watermelon increased with the increasing supplementary irrigation,but the nitrogen partial productivity and nitrogen use efficiency decreased with increasing nitrogen fertilization level.The photosynthetic rate and quality indicators increased with increasing nitrogen fertilization level as the nitrogen rate changed from 0 to 120 kg N·hm~(-2),but no further significant increase as the nitrogen rate exceeded 120 kg·hm~(-2).The interactive effects between water and nitrogen was significant for yield and water and nitrogen use efficiency of watermelon,supplementary irrigation volume was a key factor for the increase yield compared with the nitrogen fertilizer,and the yield reached the highest for the W_(70)N_(200) and W_(105) N_(120) treatments,for which the yield increased by 42.4%and 40.4%compared to CK.Water use efficiency(WUE)was improved by supplementary irrigation and nitrogen rate,the WUE of all nitrogen fertilizer treatments were more than 26 kg·m~(-3) under supplemental irrigation levels 70 m·hm~(-2) and 105m·hm~(-2).The nitrogen partial productivity and nitrogen use efficiency reached the highest in the treatment of W_(105)N_(120).It was considered that under the experimental condition,105 m~3·hm~(-2) of supplementary irrigation plus 120 kg·hm~(-2) of nitrogen fertilization was the optimal combination of obtaining the high yield and high efficiency." @default.
- W3150584789 created "2021-04-13" @default.
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- W3150584789 date "2015-01-01" @default.
- W3150584789 modified "2023-09-26" @default.
- W3150584789 title "Interactive impact of water and nitrogen on yield,quality of watermelon and use of water and nitrogen in gravel-mulched field" @default.
- W3150584789 hasPublicationYear "2015" @default.
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