灌溉水含盐量对辣椒产量品质及水分利用效率的影响

为探讨灌溉水含盐量对辣椒耗水、产量、品质和水分利用效率的影响,于2015年4—7月在江苏省农业气象试验站进行盆栽辣椒试验。试验共设置5个灌溉水盐分处理,灌溉水含盐量分别为0.9（CK）、1.6、2.7、4.7和7.0 d S/m。结果表明,耗水量随着灌溉水含盐量和饱和土壤浸提水含盐量（electrical conductivities of saturated soil extracts,ECe）的增加呈显著线性下降趋势。与CK处理相比,灌溉水含盐量高于1.6 d S/m时,辣椒产量显著降低27%-65%（P〈0.05）。通过相对产量与ECe的线性拟合得出,临界ECe为1.5 d S/m,EC...

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Published in农业工程学报 Vol. 32; no. 10; pp. 75 - 80
Main Author 邱让建 刘春伟 徐金勤 陈俊 程珊珊 柳旭 陈泓舟 王振昌
Format Journal Article
LanguageChinese
Published 南京信息工程大学江苏省农业气象重点实验室,南京,210044%河海大学水利水电学院,南京,210098 2016
Subjects
含盐量
土壤
水分利用效率
灌溉水
耗水量
含盐量
water use efficiency
salinity
irrigation
灌溉水
水分利用效率
evapotranspiration
耗水量
soils
土壤
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2016.10.011

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Summary:为探讨灌溉水含盐量对辣椒耗水、产量、品质和水分利用效率的影响,于2015年4—7月在江苏省农业气象试验站进行盆栽辣椒试验。试验共设置5个灌溉水盐分处理,灌溉水含盐量分别为0.9（CK）、1.6、2.7、4.7和7.0 d S/m。结果表明,耗水量随着灌溉水含盐量和饱和土壤浸提水含盐量（electrical conductivities of saturated soil extracts,ECe）的增加呈显著线性下降趋势。与CK处理相比,灌溉水含盐量高于1.6 d S/m时,辣椒产量显著降低27%-65%（P〈0.05）。通过相对产量与ECe的线性拟合得出,临界ECe为1.5 d S/m,ECe每增加1 d S/m产量降低5.61%,这也表明辣椒为中等盐分敏感的植物。灌溉水含盐量增加降低了果长、最大果宽、单果质量、果实个数和果实含水率,但增加了果实硬度和可溶性固形物。辣椒的水分利用效率也随着灌溉水含盐量增加而极显著线性下降（P〈0.001）。灌溉水含盐量为1.6 d S/m时,辣椒耗水、产量、品质和水分利用效率均没有显著降低,在水资源匮乏的地区可采用该电导率下的盐水对辣椒进行灌溉。研究为微咸水灌溉下辣椒生产和水分利用效率的提高提供了科学依据。
Bibliography:A pot experiment of hot pepper was conducted at Agrometeorology Research Station of Jiangsu Province from April to July, 2015 to assess the effect of irrigation water salinity on evapotranspiration, yield, fruit quality and water use efficiency.Five salinity treatments of 0.9（CK）, 1.6, 2.7, 4.7 and 7 d S/m were used and each treatment was replicated 4 times. The 20 pots were completely randomized block design. Irrigation water salinity was increasing by adding 1 ∶1 milli equivalent concentrations of Na Cl and Ca Cl2 to half strength Hoagland solution. Plants were irrigated with 120% of evapotranspiration. A glass bottle was set underneath each pot to collect drainage water amount. Evapotranspiration was calculated by water balance method. Results showed that the soil salinity was accumulated when irrigated with increasing salinity content of irrigation water. The electrical conductivities of saturated soil extracts（ECe） was significant（P〈0.001） linearly increased with the increase of irrigation water salinity
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2016.10.011