三种不同栽培方式下黄瓜产量和品质及土壤养分的研究

通过大田试验,研究有机、特别以及常规三种栽培方式下黄瓜的产量和品质及土壤养分。结果表明:有机栽培的黄瓜产量低,特别和常规依次增加。其品质有机栽培的最好,常规栽培较差。有机栽培黄瓜的硝酸盐含量低,特别、常规栽培黄瓜的硝酸盐含量依次增加。有机黄瓜的维生素C、可溶性糖含量高,常规的较低,三种栽培方式的差异均达到显著水平。可滴定酸无差异。土壤养分除有机栽培的全氮略有增加外,各栽培方式下的土壤全氮、碱解氮、全磷、速效磷、速效钾均有所下降,有机栽培的土壤养分下降最少。

Study on cucumber yield and quality and soil nutrients under three different cultural practices

A field experiment with a cucumber cultivar was carried out under the organic cultivation(OC),special cultivation(SC)and conventional cultivation(CC)to study the effects of these three cultural practices on the yield and quality of cucumber and the soil nutrients.The results showed that the OC was the lowest in yield and the CC was the highest,while in quality the OC was the best and the CC was the poorest.The ascending order of the nitrate content of cucumber in the 3 practices was the OC,the SC and the CC,and the descending order of the vitamin C and soluble sugar contents of cucumber was the OC,SC and CC.Their differences in the above indexes were significant.Because the titratable acidity of cucumber had no significant change in the three cultivations,the cucumber of the OC had the highest sugar/acid ratio and so tasted the best.In the soil nutrients,the total nitrogen,alkali-hydrolyzable nitrogen,total phosphorus,readily available phosphorus and readily available potassium somewhat decreased in all the three cultivations,except for a slight increase in total nitrogen under the OC.The decrease in the soil nutrients under the OC was the least,though the differences in the decrease among the three cultivations were not significant.