| Cite this article: | 尹志荣,蔡进军,柯英.水肥耦合下设施番茄土壤水分和养分运移特征[J].灌溉排水学报,0,():-. |
| Yin Zhirong,Cai Jinjun,Ke Ying.水肥耦合下设施番茄土壤水分和养分运移特征[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Characteristics of soil moisture and nutrient transport in facility tomato under coupled irrigation and fertilization |
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Yin Zhirong1,2, Cai Jinjun1,2, Ke Ying1,2
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1.Institute of Agricultural Resources and Environment,Ningxia Academy of Agriculture and Forestry Sciences,Observation and Experiment Station of National Agricultural Environment Yinchuan,Yinchuan Ningxia 750002;2.China
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| Abstract: |
| 【Objective】Aiming at dealing with the problems of irrigation and fertilization on greenhouse vegetables in the suburban area of Yinchuan Ningxia, the purpose of this study was to explore the optimal water and fertilizer combination for researched good-quality and high-efficiency under coupled irrigation and fertilization.【Method】The experiments consisted of irrigation and fertilization with two factors and three levels, a total of 9 treatments for analyzing the responsive rules of irrigation amount and fertilizer rate on tomato yield, water utilization, distribution of soil moisture and nutrients.【Result】The results showed that tomato yield was significantly affected by the coupling of irrigation and fertilization, compared with W1F1 treatment, the yield of W2F2 and W3F2 treatment decreased by 16.26% and 6.54%, but the water use efficiency increased by 11.62% and 66.56%. The interaction effect of different fertilization levels and water also had a significant impact on soil water and nutrients. The soil volumetric water content in the 0-20 cm soil layer showed a fluctuating decreasing trend with the advancement of the growth process, which the variation range was between 13.33 and 24.53%. The spatial distribution of soil moisture in the profile decreased with the decrease of irrigation and fertilization, and the contour lines were denser at 60cm from the ground, and soil moisture changed more dramatically. Among them, the average soil moisture content of W2F2 and W3F2 treatment 0-100cm soil was 16.53% and 16.84%. The content of soil organic matter and available nutrients in the late growth stage was more obvious than that in the middle growth stage. The changes of soil organic matter, available phosphorus and available potassium content in the root layer (0-20cm) were basically the same under the same irrigation amount, which decreased with decrease in fertilizer application. The moderately reducing the amount of irrigation was beneficial to reduce the migration of alkali-hydrolyzed nitrogen, available phosphorus, and available potassium to the deep layer under the condition of a certain amount of fertilization, which significantly increased soil nutrient content in tomato root zone.【Conclusion】This indicated that higher yield and water use efficiency could be obtained, and that could effectively increase the nutrient content of the root layer and reduce the risk of nutrient leaching at the same time, when the irrigation amount was between 160-240 m3/667m2 and the fertilization amount was 336 kg/667m2 (liquid organic fertilizer 240 kg/667m2, macro-element water-soluble fertilizer 96 kg/667m2). |
| Key words: irrigation and fertilization coupling; facility fruit tomato; yield; soil moisture content; soil nutrients |
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