咸水负压渗灌对番茄生长和土壤盐分的影响
该研究旨在探讨日光温室条件下咸水灌溉对番茄生长发育和土壤盐分积累的影响。试验采用负压渗灌设备在番茄不同生育期(全生育期、花果期、果实膨大期、采收期)、使用不同质量浓度咸水(淡水、3、5、7、9 g/L)和土壤基质势(0、-40、-80 hPa)下进行咸水灌溉,研究咸水灌溉对番茄产量、根质量、耗水量、水分利用效率和土壤盐分的影响。结果表明,番茄不同生育期耐盐能力差异明显,花果期对土壤基质势与盐分胁迫比较敏感,采收期忍耐性最强。咸水灌溉的盐分浓度临界值全生育期与花果期为3 g/L,果实膨大期为5 g/L,采收期可以用较高浓度咸水灌溉。咸水灌溉会造成温室生产系统土壤的盐分积累。适量咸水灌溉,对株体发...
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Published in | 农业工程学报 Vol. 29; no. 22; pp. 108 - 117 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
河北农业大学农学院,保定,071001%河北省农林科学科院农业信息与经济研究所,石家庄,050051%河北省农业技术推广总站,石家庄,050011
2013
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Subjects | |
Online Access | Get full text |
ISSN | 1002-6819 |
DOI | 10.3969/j.issn.1002-6819.2013.22.013 |
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Summary: | 该研究旨在探讨日光温室条件下咸水灌溉对番茄生长发育和土壤盐分积累的影响。试验采用负压渗灌设备在番茄不同生育期(全生育期、花果期、果实膨大期、采收期)、使用不同质量浓度咸水(淡水、3、5、7、9 g/L)和土壤基质势(0、-40、-80 hPa)下进行咸水灌溉,研究咸水灌溉对番茄产量、根质量、耗水量、水分利用效率和土壤盐分的影响。结果表明,番茄不同生育期耐盐能力差异明显,花果期对土壤基质势与盐分胁迫比较敏感,采收期忍耐性最强。咸水灌溉的盐分浓度临界值全生育期与花果期为3 g/L,果实膨大期为5 g/L,采收期可以用较高浓度咸水灌溉。咸水灌溉会造成温室生产系统土壤的盐分积累。适量咸水灌溉,对株体发育具有"控上促下"调节效应,利于降低耗水量、提高番茄产量与水分利用效率。因此,依据番茄不同生育阶段耐盐性的差异,利用一定浓度的咸水灌溉不仅可替代淡水资源,还可提高水分利用效率。 |
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Bibliography: | soils; salt; irrigation; saline water; growth period; soil matric potential; negative pressure irrigation; tomato 11-2047/S This research wass to test the effect of salt water irrigation on tomato growth and development, water use, and soil salty accumulation situation in a greenhouse. In the treatments, the negative pressure irrigation facilities were applied to irrigate tomatoes at different growth stages(whole growth period, blooming and fruit period, fruit enlargement period, and harvest period), using different concentrations of salt water(fresh, 3, 5, 7, 9g/L) and soil matric potential(0,-40,-80hpa) to research the effect of salt water irrigation of the tomato production, root weight, water consumption, water use efficiency, and soil salinity. The results indicate that there are remarkable differences of salt-tolerance capacity at different growth periods of tomatoes. That means the blooming and earlier fruit periods are more sensitive to soil matric potential and salt stress than other stages. The most a |
ISSN: | 1002-6819 |
DOI: | 10.3969/j.issn.1002-6819.2013.22.013 |