氮钾配合施用对桑树生长和桑叶产量的影响  

Effects of Mixed Nitrogen and Potassium Fertilizer on Growth and Leaf Yield of Mulberry

作　　者：张竹青[1] 鲁剑巍[2] 孙向阳[3] 

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023 [2]华中农业大学资源环境科学学院,湖北武汉434023 [3]北京林业大学资源环境科学学院,北京100081

出　　处：《贵州农业科学》2007年第2期65-66,73,共3页Guizhou Agricultural Sciences

基　　金：湖北省科技厅重点科研项目"湖北省桑园肥力障碍因子和蚕桑优质高效优化配方肥及配套技术研究"(2002AA201C09)

摘　　要：在大田条件下研究了不同氮肥、钾肥施用水平对桑树生长和桑叶产量的影响。结果表明,氮钾肥适合用量配比能提高桑树每株枝条数、枝条叶片数、枝条长、枝条平均重和平均单叶重。结果显示,在氮肥施用量为450 kg/hm2.a,钾肥施用量为300 kg/hm2.a时桑叶产量最高,与对照相比,平均增产35.2%。试验结果还表明,氮肥、钾肥对桑叶增产效果有互促作用。The field trail was carried out to investigate the effect of mixed nitrogen and potassium fertilizer on growth and leaf yield of mulberry. The results show that the rational mixed rate of nitrogen and potassium fertilizer can improve the branch number/plant, leaf number/branch, length and average weight of branch and average weight of the single leaf, that the highest leaf yield can be gained under applying 450 kg/ha of nitrogen and 300 kg/ha of potassium, which is 35.2% higher than CK and there is the positive mutual relationship between nitrogen and potassium fertilizer in increasing mulberry leaf yield.

关 键 词：氮肥 钾肥 配合施用 桑叶产量 

分 类 号：S888.4[农业科学—特种经济动物饲养]