摘要
以宜宾县为案例区,运用地统计学、方差分析、回归分析等方法,探讨了川中丘陵-盆周山区过渡带有机碳(SOC)和全氮(TN)含量的空间分布特征及其主控因素。结果表明,研究区SOC、TN含量平均值分别为11.23、1.45 g·kg-1,均为中等强度的空间变异性。在空间上均表现为东南部高而中北部地区低的趋势。土壤类型、土壤质地、灌溉水源、土壤侵蚀程度、种植制度均对SOC和TN的空间变异有极显著影响(P<0.01)。其中耕作制度和土壤类型共同主导着该区SOC和TN的空间变异。
Based on the soil samples collected from Yibin county,Sichuan province,the Hilly- Mountainous Basin transitional space of soil organic carbon（ SOC） and total nitrogen（ TN） distribution characteristics and main controlling factor were analyzed by using the means of geostatistics,variance analysis,regression analysis. The results showed that： SOC and TN content mean respectively 11. 23,1. 45 g·kg- 1,were moderate spatial variability. The content of SOC and TN in the southern and eastern area was much higher than that in the northern and central region. Analysis of variance showed that the effects of soil type,soil texture,irrigation water,the degree of soil erosion,cropping systems on SOC and TN were significant（ P〈0. 01）. Cropping systems and soil types together dominated the spatial variability of SOC and TN in the region.
出处
《西南农业学报》
CSCD
北大核心
2016年第9期2193-2200,共8页
Southwest China Journal of Agricultural Sciences
基金
中国烟草总公司四川省公司重点科技项目(SCYC201402006)
四川省烟草公司重点项目(201202004
201202005)
关键词
土壤有机碳
全氮
空间变异
主控因素
过渡带
Soil organic carbon
Total nitrogen
Spatial variability
Controlling factors
Transition zone
