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
