| 引用本文: | 谭军利,王西娜,马小福,等.微咸水补灌年限对压砂地水盐分布特征及西瓜产量和品质的影响 [J].灌溉排水学报,0,():-. |
| Tan Junli,Wang xina,Ma Xiaofu,et al.微咸水补灌年限对压砂地水盐分布特征及西瓜产量和品质的影响 [J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】探讨长期微咸水补灌对压砂地土壤水盐分布特征及西瓜产量和品质的影响,为压砂地微咸水安全利用提供理论依据。【方法】采用田间定位调查方法,研究了微咸水补灌年限为2a、4a、7a、10a和14a的压砂地0~60cm土壤水盐动态分布、土壤容重及土壤紧实度及西瓜产量和品质。【结果】研究结果表明,西瓜伸蔓期和收获期土壤盐分含量随补灌年限增加而增加,荒地土壤最高盐分含量出现在20~40 cm土层,而压砂地的出现在40~60 cm；微咸水补灌增加了开花坐瓜期土壤含水率,但随补灌年限增加呈先增加后减小的趋势；压砂地表层(0~10 cm)土壤含水率最高,而荒地10~20 cm的土壤含水率最高；与荒地相比,土表覆砂增加了0~40 cm土壤容重及0~8 cm土层的紧实度,而8 cm以下土壤紧实度小于荒地；西瓜产量和瓜周可溶性固形物含量随补灌年限增加分别呈降低和先增加后降低的趋势。【结论】长期微咸水补灌提高了压砂地上层土壤容重和紧实度,同时也增加了土壤含水率和盐分含量,西瓜产量及品质随微咸水补灌年限增加呈下降的趋势。 |
| 关键词: 微咸水，压砂地，西瓜，灌溉年限，土壤盐分 |
| DOI： |
| 分类号:S274 |
| 基金项目: |
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| Effects of Brackish Water Irrigated Years on Characteristics of Soil Water and Salt Distribution and the Yield and Quality of Watermelon in the Gravel-sand Mulched Field |
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Tan Junli1, Wang xina2, Ma Xiaofu3, Tian Juncang4
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1.Ningxia University;2.School of Agriculture, Ningxia University,;3.School of Civil and Hydraulic Engineering, Ningxia University;4.School of Civil and Hydraulic Engineering, Ningxia University,
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| Abstract: |
| 【Objective】The objective of this paper is to investigate the effects of long-term supplementary irrigation of brackish water on the distribution characteristics of soil water and salt, yield and quality of watermelon in gravel-sand mulched field, providing a theoretical basis for the safe use of brackish water in gravel-sand mulched field. 【Method】Dynamic distribution of soil water and salt in 0-60 cm soil layer, soil bulk density and soil compaction, watermelon yield and quality with brackish water supplementary irrigated years of 2a, 4a, 7a, 10a and 14a and the waste land without gravel-sand mulching as control were studied through field experiment. 【Result】Result showed that the soil salt content increased with the increase of supplementary irrigation years at the tendril elongation and harvest growth period of watermelon. The highest soil salt content appeared in the 20-40 cm soil layer in the wasteland, and in the 40 -60 cm soil layer in the gravel-sand mulched field. The soil moisture contents were increased at flowering and fruit-setting stage with supplementary irrigation of brackish water , but it increased first and then decreased with the increase of irrigated years. From the aspects of soil moisture content distribution, the highest soil moisture content with gravel-sand mulches appeared in the surface layer (0-10 cm), while 10- 20 cm for the wasteland. Compared with wasteland, gravel-sand mulching increased soil bulk density in 0 ~ 40 cm soil layer and soil compaction in 0 ~ 8 cm soil layer, and soil compaction below 8 cm was less than wasteland. The yield and soluble solids content of watermelon decreased and increased first and then decreased with the increase of supplementary irrigation years, respectively. 【Conclusion】Long-term brackish water supplementary irrigation increased soil bulk density and compactness in the upper layer, and also increased soil moisture content and salt content in the gravel-sand mulched field. The yield and quality of watermelon decreased with the increase of brackish water irrigated years. |
| Key words: brackish water; gravel-sand mulched field; watermelon; irrigated years; soil salt |
