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Effects of KNO3,K2SO4 and Their Mixed Salt Stress on N,P,K Content in Leaf of Pepper Seedling
Author(s): 
Pages: 218-223
Year: Issue:  5
Journal: Acta Agriculturae Boreali-Sinica

Keyword:  次生盐渍化辣椒氮磷钾亚硝酸盐;
Abstract: 为探讨日光温室土壤主要盐分对作物营养元素吸收的影响,以辣椒品种亮剑为研究试材,比较研究了0,50,100,150,200 mmol/L的KNO3、K2SO4及其混盐(1:1)对辣椒幼苗叶片内大量营养元素氮、磷、钾以及亚硝酸盐含量变化的影响,并进行了营养元素与光合指标和光合代谢产物相关性分析研究.结果表明,KNO3、K2SO4及其混盐胁迫对辣椒幼苗叶片N素含量影响存在一定差异,SO42-对NO3-的吸收有拮抗作用;盐胁迫抑制辣椒幼苗对P的吸收;随着胁迫浓度的逐渐增加,K含量大幅度增加;KNO3和混盐胁迫,辣椒幼苗叶片内亚硝酸盐含量没有增加;低浓度KNO3及其混盐胁迫,辣椒幼苗叶片内全N含量与亚硝酸盐含量呈极显著正相关,相关系数为0.830**,与Pn显著正相关,与全K含量显著负相关;高浓度KNO3及其混盐胁迫,辣椒幼苗叶片内总N含量与Chl含量、可溶性糖含量呈显著负相关关系.
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