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Position: Home > Articles > 蓄水坑灌下苹果树根系生长对不同氮素水平的响应 Water Saving Irrigation 2019 (5)

蓄水坑灌下苹果树根系生长对不同氮素水平的响应

作  者：
张人天;马娟娟;孙瑞峰;高娟;孙西欢;郭向红
关键词：
蓄水坑灌;苹果树;氮素;根长密度;根表面积密度
摘  要：
研究蓄水坑灌下不同氮素水平对苹果树根长密度和根表面积密度的影响,为确定蓄水坑灌条件下苹果树合理的施氮范围提供了依据.以7 a生矮砧密植红富士苹果树为研究对象,设置了4个蓄水坑灌施氮水平(0、10、20、40 kg/hm~2)对应T1、T2、T3、T4处理,以地面施肥作为对照组CK(施氮水平为10 kg/hm~2),利用微根管法对施肥前后不同土层深度的苹果树根长密度和根表面积密度进行了测定.结果表明:施氮可以有效促进苹果树根系生长,各处理根长密度和根表面积密度的生长速率随施氮量的增加先增大后减小.CK处理和同等施氮水平的T2处理相比,其根系在表层土壤生长状况更好,而T2处理苹果树根系在中深层土壤中发育更好.综合各个处理苹果树根系生长发育情况,本试验中T3处理最适合苹果树根系的生长发育.
作  者：
ZHANG Ren-tian;MA Juan-juan;SUN Rui-feng;GAO Juan;SUN Xi-huan;GUO Xiang-hong;College of Water Resource Science and Engineering,Taiyuan University of Technology;Shanxi Jinzhong College;
单  位：
ZHANG Ren-tian%MA Juan-juan%SUN Rui-feng%GAO Juan%SUN Xi-huan%GUO Xiang-hong%College of Water Resource Science and Engineering,Taiyuan University of Technology%Shanxi Jinzhong College
关键词：
water storage pit irrigation;;apple trees;;nitrogen;;root length density;;root surface area density
摘  要：
The effects of different nitrogen levels in water storage pits on root length density and root surface area density of apple trees are studied,which can provide a basis for determining the reasonable nitrogen application range of apple trees under the condition of water storage pit irrigation. In this paper,7 years growth short anvil and dense red Fuji apple tree are studied. Four nitrogen levels( 0、10、20、40 kg/hm~2) of water storage pits are set,namely the treatment of T1,T2,T3,T4,and the ground fertilization treatment is set as a control group CK. The root length density and root surface area density of apple trees with different soil depths before and after fertilization are measured by micro-root tube. The results show that: nitrogen application can promote the growth of apple tree roots effectively; the growth rate of root length density and root surface area density increases first and then decreases with the increase of nitrogen application rate; comparing CK to T2 under the same level of nitrogen application,the roots of CK are better than that of T2 in the topsoil,but the T2 apple tree roots develop better in the middle and deep soil. Comprehensively considering the growth and development of apple tree roots,T3 is the most suitable for the growth of apple tree roots.

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