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Influence of drip irrigation by reclaimed water on the dynamic change of the nitrogen element in soil and tomato yield and quality

机译：Influence of drip irrigation by reclaimed water on the dynamic change of the nitrogen element in soil and tomato yield and quality

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摘要

This paper carries out an analysis of the influence of the dynamic change pattern of soil in every crop growth period and irrigation by reclaimed water on yield and quality of fruit and vegetables comparative to drip irrigation by groundwater under the condition of drip irrigation by reclaimed water based on a. field experiment. The results show the variation of peak value of concentration of NH4+-N in topsoil is: drip irrigation by reclaimed water > drip irrigation by 50% reclaimed water > drip irrigation by groundwater, the concentration of NH4+-N is higher at the depth of 0-40 cm with almost no accumulation of NH4+-N below the depth of 40 cm NO3-N presence in soil slightly increases across the entire growth period with irrigation by reclaimed water. Irrigation by reclaimed water increases tomato yield and irrigation water use efficiency, and has an improved taste index indicated by an improved soluble sugar and titratable acidity content of the fruit without any obvious adverse influence on the nutritive indexes such as Vc soluble solid. The shortening of the irrigation period and increase in buried depth of drip irrigation tape are to promote an increase in tomato yield and irrigation water use efficiency to carry out drip irrigation by reclaimed water under the condition of having a shorter irrigation period and a greater depth of drip irrigation tape and to yield a higher rate of water conservation. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在再生水滴灌条件下，与地下水滴灌相比，本文分析了作物生长期和再生水灌溉下土壤动态变化方式对果蔬产量和品质的影响。在现场实验。结果表明，表层土壤NH4 + -N浓度峰值的变化为：再生水滴灌> 50％再生水滴灌>地下水滴灌，NH4 + -N浓度在0深度时较高。在整个生长期中，用再生水灌溉，在40 cm深度以下的-40 cm处几乎没有NH4 + -N积累，NO3-N在土壤中的存在略有增加。用再生水灌溉可提高番茄产量和灌溉用水效率，并具有改善的味觉指数，表明果实的可溶性糖和可滴定酸度有所提高，而对诸如Vc可溶性固形物等营养指数没有任何明显的不利影响。缩短灌溉周期，增加滴灌带的埋深，是为了提高番茄产量和灌溉用水效率，从而在较短的灌溉周期和较大的灌水深度的条件下用再生水进行滴灌。滴灌带，以提高节水率。 （C）2016 Elsevier Ltd.保留所有权利。

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