摘要
采取选择代表性样地、品字形选择样点、分层采集土样、化验分析、与国家土壤微量元素分级标准比较等方法,研究了凤县花椒园铜、铁、锰、锌等4种微量元素的含量和水平,结果为4种微量元素0~20cm土层有效含量都大于20~40cm土层,具有一定的表聚性;0~40cm土层有效铜平均含量为(0.967±0.29)mg·kg-1,所有样地都达到中等或丰富水平,不同地段之间变化较小;有效铁平均含量为(7.562±2.379)mg·kg-1,总体等级平均达到中等,不同地段之间差别不大;有效锰平均含量为(9.396±1.560)mg·kg-1,水平较低,总体等级为较缺;有效锌平均含量为(2.760±2.348)mg·kg-1,总体等级为丰富,但样地之间变化较大;今后花椒生产中可少施或不施铜肥,普遍注意增施锰肥,对一些有效铁、有效锌含量水平较低的地段也应注意施肥。
Microelements of Cu, Fe, Mn and Zn in the soil at Zanthoxylum bungeanum Maxim orchard in Feng County were analyzed by sampling different soil layers from the sample plot and through chemical methods, and compared with the state standards of microelements classification. The result showed that four microelements available contents in 0-20cm of soil were higher than those in 20-40 cm soil, indicating the aggregation in surface of soil. Mean content of available Cu in 0 - 40 cm is （0. 967±0.29） mg · kg^-1 , indicating rich content in all sample plot and slight difference among plots; mean content of available Fe in 0;40 cm is （7. 562±2. 379） mg · kg^-1 , reaching middle class of con- tent and indicating no significant different among the plots; mean content of available Mn in 0-40 cm is （9. 396±1. 560） mg · kg^-1 , indicating lower level of content while mean content of available Zn in 0 -40cm is （2. 760±2. 348） mg· kg^-1, indicating high level of content but significant change among plots. The implications to practice is that less or no use of Cu fertilizer, increase of Mn fertilizer in all field and increase Fe fertilizer in the field of lower level of available Fe are effective.
出处
《陕西林业科技》
2017年第2期7-11,共5页
Shaanxi Forest Science and Technology
基金
西北农林科技大学试验示范站科技推广项目(GTZX2015-28)
关键词
凤县
花椒
土壤
微量元素
含量水平
Feng County
Zanthoxylum bungeanum Maxim
microelements
level of content
