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沼液对水培生菜生长、养分及水分利用效率的影响

作  者:
杨鑫;王文娥;胡笑涛;李兴杰;苏苑君
单  位:
西北农林科技大学旱区农业水土工程教育部重点实验室
关键词:
水培生菜;产量;养分利用效率;水分利用效率
摘  要:
采用深液流水培法,对生菜在不同沼液替换比例配制有机无机复合营养液条件下的生理生长、产量及其对营养液养分和水分利用效率进行了研究。结果表明沼液对生菜叶面积、产量,养分及水分利用效率的提高有显著的作用,在沼液替换比例为10%、20%、40%的条件下,生菜的叶面积、产量、养分及水分利用效率均随着沼液替换比例的提高而增加。在60%和80%的沼液替换比例条件下,生菜的产量和植株对养分、水分的吸收利用率都有所下降,过高沼液替换营养液比例不利于生菜的生长。在这种复合营养液条件下,生菜对于氮、磷及镁元素的吸收利用率较高,对于钾和钙的需求量较低。
译  名:
Effects of Biogas Slurry on Yield,Water and Nutrient Utilization Efficiency of Hydroponic Lettuce
作  者:
YANG Xin;WANG Wen-e;HU Xiao-tao;LI Xing-jie;SU Yuan-jun;Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Ministry of Education,Northwest A & F University;
关键词:
hydroponic lettuce;;production;;the nutrient use efficiency;;the water use efficiency
摘  要:
The experiment was studied the effect of different biogas slurry replacement ratio of nutrient by Deep Flow Technique(DFT)on growth,water and nutrient utilization efficiency of hydroponic lettuce.The result showed that the biogas slurry could bring out a obvious promotion of the leaf area,yield,nutrient and water use efficiency of lettuce,which increased significantly with increasing of biogas slurry replacement ratio among 10%,20%and 40% dosage.However those decreased to some extent among 60%and 80% replacement ratio,the excessive biogas slurry replacement ratio was not conducive to the growth of lettuce.The hydroponic lettuce had a higher absorption and utilization of N,P and Mg under the condition of the composite nutrient solution.While the demand of K and Ca for lettuce was relatively low.

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