桂西北环境移民示范区柑桔园叶片营养状况研究  

Studies on citrus leaves nutrient status in citrus orchards in demonstration area of environmental immigrants in northwest Guangxi

作　　者：余红兵[1] 谭全元[1] 王仁才[2] 肖润林[3] 杨知建[2] 

机构地区：[1]湖南城市学院,湖南益阳413000 [2]湖南农业大学,湖南长沙410128 [3]中国科学院亚热带农业生态研究所,湖南长沙410125

出　　处：《广西农业科学》2007年第6期648-652,共5页Guangxi Agricultural Sciences

基　　金：国家"十五"科技攻关项目(2001BA606A-8);中国科学院重点项目(NK十五-D-15)

摘　　要：2002-2003年，通过对桂西北环境移民示范区柑桔园植柑叶片营养状况进行调查，结果表明该区柑桔园植柑叶片营养元素磷、氮含量大部分处于适宜水平，钾营养缺乏严重，镁、钙含量大部分处于适宜水平而部分缺乏，铁、锰含量适宜，铜、锌含量则呈不同程度的缺乏。叶片大量元素中钾含量的变异最大，氮的变异最小；叶片中各微量元素的变异系数都很大，表现为铜〉锰≈铁〉锌。叶片营养元素间的拮抗与协同作用相当普遍。叶片中氮与钾之间呈负相关，钾与钙之间呈极显著负相关，氮与磷、钙有显著的协同作用，钙与镁呈正相关。DRIS指数分析结果表明，柑桔园严重缺钾，磷、钙、镁较适宜，而不缺氮。不同年份间叶片营养元素含量的差异较明显，不同地点间叶片大部分营养元素含量呈显著差异。研究初步提出该示范区柑桔园植柑叶片营养元素含量的适宜范围，可供该示范区柑桔营养诊断及合理施肥参考。In 2002-2003, the nutrient status of citrus leaves collected from the demonstration area of environmental immigrants in northwest Guangxi were investigated. The results showed that the contents of P and N for most of samples were in suitable level, while that of K was seriously deficient ; the content of Mg and Ca for most of samples were at optimal level and few samples were deficient; the content of Fe and Mn of all samples were suitable, and that of Cu and Zn were deficient to different extent. For macroelements in leaves, the variation of K was maximum and that of N was minimum. But for microelements in leaves, the variation coefficients were very high, and the order was Cu〉Mn≈Fe〉Zn. Moreover, there commonly existed antagonism and synergism between the elements in leaves. The correlation of N and K in leaves was negative, but there existed a significantly negative correlation between K and Ca. There was a significant synergism between N and P, N and Ca. The correlation between Ca and Mg were positive. The analysis of DRIS index indicated that K was seriously deficient, P, Ca and Mg was optimal, and N was abundant. Moreover, the differences of elements in leaves in different years were obvious, and the differences of most elements in leaves of citrus orchard in different sampling locations were significant. The optimum range of mineral elements in leaves of citrus orchards demonstration area was proposed, which could provide the reference for nutrition diagnosis and rational fertilizing.

关 键 词：环境移民示范区 柑桔园 叶片营养 

分 类 号：S158.3[农业科学—土壤学]