Research On The Effects On Growth Of Cucumber Under Generant Of Re-formed Salted Soil In Sunlight Greenhouse In Ningxia

The fertilization of production of cucumber in sunlight greenhouse of different using time and salt content in different horizons of soil were investigated in Ningxia ying chuan region, research on the effects on growth, yield, quality, disease resistance, photosynthesis and nutrition absorb of cucumber under generant of re-formed salted soil in sunlight greenhouse in Ningxia, modeling different characteristics of re-formed salted soil by adding mixed salt of Ca(NO3) 2 and NaCl (5:1) in dry earth. The main results as follow:1 .The nitrogen application was at high level in cucumber culturing in Ningxia ying chuan region, the carbamide amount was six times of normal amount; soil salt was of highest level in the top soil (0-20cm). The salt content in different horizons of soil in sunlight greenhouse has been 3~4g/kg after used 2~3 years.2. With mixed salt concentration increasing, Influence on rate of emergence of cucumber at non-germination treatment was more serious; existent amount of seeding and three index of growth amount at different stages were decreased : start florescence was postponed, location of the first femal flower was ascended, the length of melon was cut down obviously, unbalanced melon happened rate was increased; Chlorophy II content of cotyledon and foliage increased at plantlet stage obviously; the Pn of 0.1% mixed salt concentration was the highest, but With mixed salt concentration increasing, photosynthesis of cucumber was repressed obviously, the main limitational factor was stoma element, PS II was not damaged, from 0.4% mixed salt content, the probability of causing photoinhibition increased; the accumulated uptake amount of total N, P and K was lower at different growth; early yield and total output of 0.2%, 0.3%, 0.4% mixed salt content were decreased seriously; Vc, roughly protein, soluble sugar and NO2,NO3- content in the cucumber fruits increased; outsides, incidence of disease will be raised by a wide margin.3.At 0.4% mixed salt content treatment, the effected degree of rate of emergence and existent amount of seeding of Hua Nan genotype xiang yuan N0.2 at different germination treatment were higher than that of Hua Bei genotype; entering early fruit stage, the stem height and perimeter , fresh weight and dry weight of Hua Nan genotype strain were lower than that of Hua Bei genotype, although start florescence was the earliest, goods feature of melon strips was worse; Chlorophy II content of Hua Nan genotype strain leaf had no remarkable differences compared with Hua Bei genotype at plantlet stage, but it was lower than Hua Bei genotype at vigorous stage; two genotypes have no differences to the highest Pn and Gs, the highest Tr and the highest WUE of Hua Nan genotype strain in a day were higher than that of Hua Bei genotype obviously at plantlet stage, but Ci was contrary; Fm and Fv of Hua Nan genotype strain of xiang yuan N0.2 were lower than that of Hua Bei genotype obviously, but there were no differences between two genotypes in Fo and Fv/Fm; the accumulated uptake amount of total N, P and K of Hua Nan genotype strain were the same as Hua Bei genotype at plantlet stage, but those werelower than Hua Bei genotype at early fruit, mid fruit and late fruit stage; there was no differences between two genotypes in early yield, total output of Hua Nan genotype strain of xiang yuan N0.2 was lower than that of Hua Bei genotype;Vc, soluble sugar and NO2-, NO3- content in the cucumber fruits of Hua Nan genotype strain were higher than Hua Bei genotype greatly, but roughly protein was contrary, NO2, NO3-, content in the cucumber fruits of different genotypes weren't superstandard; there was no differences between two genotypes in incidence of disease.