杉木种子园土壤养分限制因子的研究  

Nutrient limit factors of soil in the Cunninghamia lanceolata seed orchard

作　　者：李燕燕[1] 许鲁平 郑双全 孟庆银 张子文 樊后保[1] 

机构地区：[1]南昌工程学院生态与环境科学研究所,江西南昌330099 [2]沙县官庄国有林场,福建沙县365503

出　　处：《森林与环境学报》2016年第4期429-433,共5页Journal of Forest and Environment

基　　金：江西省高校科技落地计划(KJLD12097);江西省高校"十二五"水土保持与荒漠化防治重点学科培育基金;三明市科技项目(2012-N-20)

摘　　要：为了解杉木种子园的土壤养分状况及吸附特性,应用土壤养分状况系统研究法对杉木种子园进行了土壤养分吸附特性研究,并根据盆栽试验判断出限制杉木种子园产量的养分因子。结果表明,第3代杉木种子园中土壤有效P的含量为6.8 mg·L^(-1);Ca和Mg含量分别为99.9和14.9 mg·L^(-1),远低于美国国际农化服务中心(ASI)的临界值,B、Cu、Mn、Zn和S的含量丰富,分别为0.78、2.6、11.1、2.5和67.7 mg·L^(-1);吸附试验表明,P的吸附能力最强,吸附率为53.9%;根据盆栽试验结果来看,杉木种子园土壤养分亏缺程度为P>Ca>N>Mg,微量元素则处于盈余水平。因此,在杉木种子园的施肥管理中,施用N肥时应增施P、Ca肥,同时通过改善经营措施提高N、P肥的利用率,从而实现杉木种子园土壤的养分平衡和高产优质。To investigate the soil nutrient status and adsorption characteristics of Cunninghamia lanceolata seed orchard, the characters of soil nutrient adsorption were observed and the nutrient limit factors were discovered by potting experiment and by the system diagnosis method of soil nutrient status. The results showed that the content of P was 6.8 mg-L-1 that was a little more than the critical value of P in a third generation C. lanceolata seed orchard. The contents of Ca and Mg were 99. 9 and 14. 9 mg-L-1 , respectively, that was far below the critical value of Ca and Mg in the United States International Agricultural Service Center. The content of B, Cu, Mn, Zn and S were 0. 78, 2. 6, 11. 1, 2. 5 and 67. 7 mg-L-1 , which was rich. The soil adsorption rate of phosphorus was 53.9% which was the highest. According to the result of potted experiment, the order of nutrient deficiency in the Chinese fir seed orchard soil was P〉Ca〉N〉Mg and the trace elements were in surplus. Therefore P, Ca fertilizer should be increased when applying N fertilizer and the use efficiency of N, P fertilizer will be improved so as to realize soil nutrient balance during the third generation Chinese fir seed orchard management.

关 键 词：种子园 系统研究法 土壤养分 

分 类 号：S725.5[农业科学—林木遗传育种]