摘要
Abstract
[Objective] The aim was to study effects of different nitrogen forms and different levels on leaf physiological indexes of cucumber seedling, and provide some reference for using N fertilizer scientifically and reasonably, for enhancing cucumber yield and improving cucumber quality. [Method] Taking Dayesan cucumber as material, pot experiment was tested in solar greenhouse, there were 16 treatments with 3 N fertilizers, such as CO(NH_2)_2, NaNO, and NH_4HCO_3 under the concentrations of 200, 300, 400, 500 and 600 kg/hm~2, and the control that was without N fertilizer. [Result] When the concentration of NH_4HCO_3 was 600 kg/hm~2, the chlorophyll content in cucumber leaf was highest, reached to 2.37 mg/gFW. When CO(NH_2)_2 concentration was 500 kg/hm~2, the soluble sugar content was highest, and 9.82 mg/gFW, when 300 kg/hm~2, the content of Vc reached to 0.563 2 mg/100 g. The concentrations of 3 N fertilizers all were 600 kg/hm~2, the nitrate N contents were 0. 18% , there were different effects of N fertilizer under different levels on photosynthesis intensity of cucumber seedling. When the concentration of CO(NH_2)_2 was 400 kg/hm~2, the respiration intensity was strongest, reached to 0.128 mg/(dm~2·h). [Conclusion] Urea was the more suitable fertilizer for growth of cucumber seedlings.关键词
N肥/黄瓜/生理指标Key words
N fertilizer/ Cucumber/ Physiological indexes分类
农业科技
