核农学报2016，Vol.30Issue(12)：2460-2466,7.DOI:10.11869/j.issn.100-8551.2016.12.2460
外源硝酸钙对水培生菜生长及矿质元素吸收的影响
Effect of Exogenous Calcium Nitrate on Dynamic Growth and Nutrient Absorption of Hydroponic Lettuce
摘要
Abstract
To determine the mineral content of lettuce under calcium nitrate treatment and improve the nutritional quality of lettuce products,0.1％,0.3％,and 0.5％ calcium nitrate was sprayed separately on lettuce foliage and distilled water sprayed as control.The growth index,yield,quality and mineral absorption of lettuce were measured,recorded and statistically analyzed.The results showed that calcium nitrate spraying induced the activities of SOD,POD,and CAT.Calcium nitrate treated 28 days;vitamin C content of 3 treatments was lower than control,but the difference was not significant.Nitrate content of 0.5％ was remarkably higher than that of control,and other treatments had no significant difference compared with the control.0.3％ treatment of soluble protein and chlorophyll content was dramatically higher than that of control.Sprayed calcium nitrate increased number of leaves,root length and root shoot ratio.Under the 0.3％ sprayed condition,the yield increased by 5.9％.What’s more,the ground part of the lettuce,calcium nitrate sprayed increased the content of phosphorus,potassium and calcium.Compared with controls,calcium content of 0.3％ treatment increased 30.8％,iron content increased 5.3％,but magnesium content decreased 3.2％.In 0.1％ treatment,iron and magnesium content increased 30.0％ and 20.3％,respectively.However,with the increase of calcium nitrate,iron and magnesium content of 0.5％ treatment decreased 13.1％ and 1.1％,separately.The higher amount of calcium nitrate concentration,the lower zinc content of ground part of the lettuce,and zinc content of 0.5％ treatment was the lowest between treatments,dropping 25.8％ compared with controls.In conclusion,spraying proper calcium nitrate can increase the content of calcium,trace element and nutrition quality of hydroponic lettuce.The findings could guide to spraying calcium nitrate in hydroponic lettuce production,which provides a theoretical basis for improving the trace mineral elements content and promote the formation of high nutritional quality.关键词
硝酸钙/生菜/水培/品质Key words
calcium nitrate/lettuce/hydroponics/quality引用本文复制引用
何鑫,张存政,刘贤金,卢海燕,梁颖..外源硝酸钙对水培生菜生长及矿质元素吸收的影响[J].核农学报,2016,30(12):2460-2466,7.基金项目
江苏省自主创新项目[CX(15) 1016] （15）
