Study Of Water And Fertilizer Coupling Effect Under Drip Fertitigation In Greenhouse Vegetable

The paper discusses the coupling effect of drip-irrigated and feitilizer on tomato and cucumber growth,yield,quality under the condition of pearlstone cultivation and drip-irrigation applys fertilizer in greenhouse.The major results as follows: 1. Major results of tomato: (1) As for effect of factors tests on the tomato vegetative growth, amount of water is listed at first, amount of feitilizer is the second.With the increasing water application,tomato vegetative growth is increased;By the way,the effictiveness of coupling of high water and mid-fertilizer is very best for tomato vegetative growth. (2) Tomato yields are significantly depended on the interaction of water and fertilizer,and amount of feitilizer,as can be showed in the progressive regression analysis for yields and fertilizer and accumulative irrigation amount. (3) When the amount of feitilizer is 0.147kg/d.a at its seedling stage and 0.648kg/d.a at fruitage, amount of water is 875L/d.a at its seedling stage and 1155L/d.a at fruitage,tomato yields are maximum,( density is 3500s/a). (4) Tomato vegetative growth was positively related with productive obviously. (5) As far as the nutrition component in tomato fruit,the affect of water is lesser, the affect of fertilizer is larger;Mid-fertilizer improves Vc contents,and high fertilizer can improve the ratio of suger/acid in tomato fruit. 2. Major results of cucumber: (1) As for effect of factors tests on the cucumber vegetative growth, amount of fertilizer is listed at first, amount of water is the second;By the way,the effictiveness of coupling of mid-water and mid-fertilizer is very best for tomato vegetative growth. (2) the treatment of cucumber first female flower nodule position is rock-bottom is the interaction of mid-fertilizer and mid-water,which can improve cucumber prematurity,and make cucumber put on sale ahead of time. (3) Cucumber yields are significantly depended on the amount of feitilizer,as can be showed in the progressive regression analysis for yields and fertilizer and accumulative irrigation amount. (4) When the amount of feitilizer is 0.189kg/d.a at its seedling stage and 0.525kg/d.a at fruitage, amount of water is 728L/d.a at its seedling stage and 1603L/d.a at fruitage,tomato yields are maximum,( density is 3500s/a). (5) Cucumber vegetative growth was positively related with productive obviously. (6) Soluble solid substances and Vc contents are not basically effected by amount of water and feitilizer.