摘要
通过田间采样和室内分析的方法,对南方典型红壤丘陵区稻田土壤44个样品进行检测分析,以pH、有机质、全氮、碱解氮、有效磷、速效钾为评判指标,运用PI指数模型法对水稻土的肥力质量进行综合评价,探讨该区域的土壤养分肥力水平以及水稻产量与土壤肥力的关系。研究结果表明:(1)本实验区水稻土有机质含量丰富,供氮能力较高,土壤为弱酸性与中性土壤,较适合水稻生长,但其供磷与供钾水平相对较低。(2)各样品肥力指数与实际产量之间的相关系数为0.736**,即水稻产量对土壤肥力呈极显著正相关关系。
About 44 paddy soil samples from the typical red soil hilly areas of the southern China were analyzed by field sampling and laboratory analysis.Using pH,organic matter,total N,available N,available P,rapidly available K as the indicators,the fertility of paddy soil samples was evaluated and the relationship between the soil fertility and rice yield was analyzed with PI index model method.The results revealed that: 1) the paddy soils in the studied area were weakly acidic or neutral,with abundant organic matter,high N-supplying capacity and relatively low P and K levels,which is suitable for rice growing.2) The correlation coefficient between the soil fertility and actual yield was 0.736(significantly),which indicated that there was a positive correlation between rice yield and soil fertility.
出处
《地理科学》
CSCD
北大核心
2011年第4期495-500,共6页
Scientia Geographica Sinica
基金
国家863项目(2007AA10Z222)资助
关键词
PI模型
红壤丘陵区
土壤肥力
水稻土
PI index model
red soil hilly region
soil fertility
paddy soil