不同N素形态及其不同水平对黄瓜幼苗叶片生理指标的影响  

Effects of Different Nitrogen Forms and Different Levels on Leaf Physiological Indexes of Cucumber Seedling

作　　者：张志[1,2] 翟瑞常[1] 张东向[2] 

机构地区：[1]黑龙江八一农垦大学,黑龙江大庆163319 [2]齐齐哈尔大学生命科学与工程学院,黑龙江齐齐哈尔161006

出　　处：《安徽农业科学》2009年第30期14660-14661,14666,共3页Journal of Anhui Agricultural Sciences

摘　　要：[目的]研究不同N素形态及其不同水平对黄瓜幼苗叶片生理指标的影响,为科学合理地利用氮肥,提高黄瓜产量和改善黄瓜品质提供参考。[方法]以大叶三黄瓜为试验材料,于日光温室内进行盆栽试验,用尿素、NaNO3、NH4HCO33种N肥以200、300、400、500和600kg/hm2施肥水平进行16个处理,以不施肥为对照处理。[结果]当NH4HCO3使用量为600kg/hm2时,黄瓜叶片中的叶绿素含量达到最大值,为2.37mg/gFW;当尿素的使用量为500kg/hm2时,黄瓜幼苗叶片中可溶性糖含量最高,达9.82mg/gFW;当尿素使用量为300kg/hm2时,Vc含量最高,为0.5632mg/100g;当3种N肥的使用量都为600kg/hm2时,黄瓜幼苗叶片硝态N含量均达到0.18%;施用N肥对黄瓜幼苗叶片光合作用强度在不同水平有不同的影响;当尿素使用量为400kg/hm2时,呼吸作用强度最强,达0.128mg/(dm.h)。[结论]尿素是更适合黄瓜幼苗生长的肥料。[ 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 （ NH2 ） 2, NaNO3 and NH4 HCO3 under the concentrations of 200,300,400,500 and 600 kg/hm^2, and the eontrol that was without N fertilizer. [ Result] When the concentration of NH4HCO3 was 600 kg/hm^2, the chlorophyll content in cucumber leaf was highest, reached to 2.37 mg/gFW. When CO（ NH2 ） 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（ NH2 ）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 

分 类 号：S642.2[农业科学—蔬菜学]