论文部分内容阅读
以香蕉种植区127hm2香蕉地为研究对象,网格法(100m×100m)采集表层(0~30cm)土样170个,采用传统统计和地统计学相结合的方法,研究土壤pH及速效钾的空间变异特征。结果表明:土壤pH和速效钾有明显的空间变异结构;pH变异函数符合线性模型,速效钾符合指数模型,pH和速效钾具有中等的空间相关性;土壤速效钾与pH呈极显著正相关,表明研究区域内土壤钾素的有效性受土壤pH的明显影响,土壤pH的升高或降低是导致土壤速效钾变化的主要原因之一。通过研究土壤速效钾的空间变异性,获取香蕉地土壤速效钾、pH的连续分布图,为土壤钾养分分区管理及科学施肥提供依据。
Taking banana land of 127 hm2 in banana growing area as research object, 170 soil samples of surface layer (0 ~ 30 cm) were collected by grid method (100m × 100m). The effects of soil pH and available potassium were studied by traditional statistical and geostatistical methods. Spatial variation characteristics. The results showed that soil pH and available potassium had obvious spatial variation structure. The pH variation function accorded with the linear model and the available potassium coincidence index model. There was a moderate spatial correlation between pH and available potassium. There was a significant positive correlation between available potassium and pH, It shows that the availability of soil K in the study area is significantly affected by the pH of the soil. The increase or decrease of soil pH is one of the main causes of the change of available K in the soil. By studying the spatial variability of available K, the continuous distribution of available potassium and pH in banana soils was obtained, which provided the basis for the management of soil potassium and the scientific fertilization.