论文部分内容阅读
采用GPS定位技术,在陆良烟区采集土壤样品340个,运用地统计学和经典统计学研究了区域植烟土壤主要养分的总体特征、空间变异特征和丰缺格局。结果表明,植烟土壤全氮、全磷和全钾平均含量分别为1.44 g/kg、0.92 g/kg和11.57 g/kg,速效氮、速效磷和速效钾平均含量分别为110.12 mg/kg、44.71mg/kg和131.45 mg/kg。土壤养分的块金效应介于28.30%~48.41%,表现为中等的空间相关性,空间变异受结构性因素和随机性因素共同影响。土壤全氮和速效氮含量中等,44.33%面积的土壤全氮含量过高,22.25%面积的土壤速效氮含量过高;土壤全磷含量较低,96.64%面积的土壤全磷含量缺乏,土壤速效磷丰富,48.07%面积的土壤速效磷含量过高;土壤全钾含量极低,97.68%面积的土壤全钾含量缺乏,速效钾含量中等,14.44%面积的土壤速效钾含量缺乏。
Using GPS technology, 340 soil samples were collected from Luliang tobacco growing areas. The characteristics of total nutrients, spatial variability and abundance and deficiency of main nutrients in tobacco soil were studied by geostatistics and classical statistics. The results showed that the average contents of total nitrogen, total phosphorus and total potassium in tobacco were 1.44 g / kg, 0.92 g / kg and 11.57 g / kg respectively, and the average contents of available nitrogen, available phosphorus and available potassium were 110.12 mg / kg, 44.71 mg / kg and 131.45 mg / kg. The nugget effect of soil nutrients ranged from 28.30% to 48.41%, showing medium spatial correlation, and spatial variation was affected by both structural and random factors. Soil total N and available N were medium, 44.33% of the total soil N content was too high, 22.25% of the area of soil available N was too high; the content of total phosphorus in soil was low, and 96.64% of the area was deficient in total P, The content of available phosphorus in the soil with 48.07% area was too high. The content of total potassium in the soil was very low. The total potassium content in the soil with 97.68% area was lacking. The content of available potassium was medium. The available potassium content in 14.44% area was lacking.