| Cite this article: | 刘亚南,白美健,张宝忠,等.黄金梨树产量及水肥生产率对水氮耦合方案的响应分析[J].灌溉排水学报,2020,(10):-. |
| liuyanan,baimeijian,zhangbaozhong,et al.黄金梨树产量及水肥生产率对水氮耦合方案的响应分析[J].灌溉排水学报,2020,(10):-. |
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| Study on response of yield and water and fertilizer use efficiency of golden pear to water and fertilizer coupling schemes |
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liuyanan, baimeijian, zhangbaozhong, wuxianbing, shiyuan
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China institute of water resource and Hydropower research
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| Abstract: |
| Water and fertilizer coupling technology is an important technical means to improve water and fertilizer utilization efficiency, stabilize and increase production. In order to explore the effects of different water and nitrogen coupling schemes on the yield of golden pear trees and water and nitrogen fertilizer productivity, a water and nitrogen coupling experiment in field plots was conducted. The test set two factors and three levels, that is, three irrigation limits (Hw: 75% Fc, Mw: 65% Fc, Lw: 55% Fc), three nitrogen application levels: Hf: 486 kg N hm-2, Mf: 324 kg N hm-2, Lf: 162 kg N hm-2), a total of 9 water and nitrogen coupling schemes: low water and high fertilizer (LwHf), low water (LwMf), low water and low fertilizer (LwLf), medium water High fertilizer (MwHf), medium water fertilizer (MwMf), low water fertilizer (MwLf), high water high fertilizer (HwHf), high water fertilizer (HwMf), high water low fertilizer (HwLf), and conventional treatment (CK). The results showed that the irrigation and nitrogen application rates had significant effects on the values of yield, irrigation water productivity, and partial productivity of fertilizers, but the response laws of different indicators were not completely consistent. Yield and irrigation water productivity increased monotonically with the nitrogen application rate, but with the irrigation amount showed a hyperbolic trend, and the suitable irrigation amount increased below (the appropriate value in this study was about 60 m3 / mu), and the above decreased. The fertilizer partial productivity decreased monotonically with the nitrogen application rate, and was relatively less affected by the irrigation amount. It is suitable for irrigation. The magnitude is monotonically increasing below, and the above effects are not obvious. When selecting an appropriate water and fertilizer management plan in actual production, it is necessary to consider the needs of multiple targets such as output and environment. Based on the response of yield, irrigation water productivity and partial productivity of fertilizers to water and nitrogen application in this experiment (Beijing-Tianjin-Hebei region), comprehensive analysis and comparison results of pear fruit yield, irrigation water productivity and partial productivity of fertilizers were applied. When N application is around 300 kg hm-2 and the irrigation volume is about 60 m3 / mu, each index value can be at a relatively high level. |
| Key words: drip;irrigation, water;and fertilizer;coupling, golden;pear tree, yield, water;use efficiency, fertilizer;partial productivity |
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