CAJ | 학술논문

南方高温多雨条件下土壤有机碳及养分含量变化大，把握其含量特征及关联利于制定土壤环境健康的合理施肥模式。对我国南方桂东地区主要肥力因素的分布特征进行分析，通过相关分析及逐步回归分析探明土壤有机碳与土壤养分间的内在联系，借助通径系数明确各养分因素影响土壤有机碳的程度，为我国南方土壤可持续利用提供参考。桂东地区土壤主要肥力指标分析结果表明，土壤有机碳、 pH 值、全氮、有效磷、速效钾的均值分别为21．6 g·kg -1、6．9、2．1 g·kg -1、23．5 mg·kg -1和89．3 mg·kg -1；且各指标频数分布分析结果显示，除速效钾外(仅40%达中、高水平)，其余指标有83%~96%的含量达中、高肥力水平。上述结果说明，尽管近年来该区域土壤肥力得到一定提高，而土壤钾含量低仍是该区域当前土壤肥力提升的限制性因子。在该区域内，土壤有机碳与全氮、 pH 值、有效磷、速效钾间呈显著相关，其相关系数依次降低。总体上土壤有机碳含量与土壤肥力水平一致，表明该区域下可通过调节土壤 pH 配合施用氮、磷、钾肥提高土壤有机碳。
남방고온다우조건하토양유궤탄급양분함량변화대，파악기함량특정급관련리우제정토양배경건강적합리시비모식。대아국남방계동지구주요비력인소적분포특정진행분석，통과상관분석급축보회귀분석탐명토양유궤탄여토양양분간적내재련계，차조통경계수명학각양분인소영향토양유궤탄적정도，위아국남방토양가지속이용제공삼고。계동지구토양주요비력지표분석결과표명，토양유궤탄、 pH 치、전담、유효린、속효갑적균치분별위21．6 g·kg -1、6．9、2．1 g·kg -1、23．5 mg·kg -1화89．3 mg·kg -1；차각지표빈수분포분석결과현시，제속효갑외(부40%체중、고수평)，기여지표유83%~96%적함량체중、고비력수평。상술결과설명，진관근년래해구역토양비력득도일정제고，이토양갑함량저잉시해구역당전토양비력제승적한제성인자。재해구역내，토양유궤탄여전담、 pH 치、유효린、속효갑간정현저상관，기상관계수의차강저。총체상토양유궤탄함량여토양비력수평일치，표명해구역하가통과조절토양 pH 배합시용담、린、갑비제고토양유궤탄。
It is important to understand the soil organic carbon (SOC) and soil nutrients characters for selecting a suitable fer-tilization management for the soil environment health in rainy southern China with high temperature. We analyzed frequencies and the regression correlations of the SOC and other four key nutrients’ contents in eastern area of Guangxi province. The results showed that the SOC, pH, total N and available P contents of 83% ~ 96% samples were at the medium or high level, with a mean of 21. 6 g·kg - 1 , 6. 9, 2. 1 g·kg - 1 and 23. 5 mg·kg - 1 , respectively. The average content of available K was 89. 3 mg·kg - 1 , and 40% samples belonged to medium and high level. It showed that although the soil fertility was increasing in the survey place in these years, K application should be encouraged for maintaining high soil fertility. There was significant re-lationship among the SOC and other key nutrients, and the correlation value was total N > pH > available P > available K. It showed that the optimized fertilization and improved pH were the key factors to improve the soil fertility and the SOC level.