不同浓度咸水灌溉对冬小麦生长的影响

研究了地下水水位为2 m时,不同浓度的咸水（1.5、2.5、3.5和4.5 g/L）灌溉对冬小麦株高、叶面积指数、分蘖干重、叶绿素含量的影响.结果表明：当咸水的浓度为1.5 g/L时,平均株高为58.9 cm,平均叶面积指数为5.69,平均分蘖干重为1.41 g,平均叶绿素含量为26.39 mg/L;与1.5 g/L浓度咸水灌溉相比,浓度为2.5 g/L时平均株高、平均叶面积指数、平均分蘖干重和平均叶绿素含量分别减少1.8%、10.5%、10.6%和1.7%;灌溉咸水浓度为3.5 g/L时平均株高、平均叶面积指数、平均分蘖干重和平均叶绿素含量较1.5 g/L时分别减少4.6%、22.8%、22.0%和3.6%;灌溉咸水浓度为4.5 g/L时平均株高、平均叶面积指数、平均分蘖干重和平均叶绿素含量较1.5 g/L时分别减少8.5%、29.0%、27.6%和5.6%.灌溉咸水浓度越高,对冬小麦生长的抑制作用越大.

Study on the impact of saline water with different concentration on growth of winter wheat

Plant height,leaf area index,dry weight of tillers and chlorophyll content of winter wheat irrigated with different concentrations of saline water（1.5,2.5,3.5 and 4.5 g/L） was studied when the ground water level is 2 m.The results showed that average plant height was 58.9 cm,average leaf area index was 5.69,average dry weight of tillers was 1.41 g,and average chlorophyll content was 26.39 mg/L when the concentration of saline water is 1.5 g/L（as control）;When the concentration is 2.5 g/L,average plant height,average leaf area index,average dry weight of tillers and average chlorophyll content decreased by 1.8%、10.5%、10.6% and 1.7% rseparately compared with control;When the concentration is 3.5 g/L,average plant height,average leaf area index,average dry weight of tillers and average chlorophyll content decreased by 4.6%、22.8%、22.0% and 3.6% rseparately compared with control;When the concentration is 4.5 g/L,average plant height,average leaf area index,average dry weight of tillers and average chlorophyll content decreased by 8.5%、29.0%、27.6% and 5.6% rseparately compared with control.The growth inhibition of saline water on winter wheat was increased with the increase of concentration.