【摘要】 通过实地采样分析与地统计学方法,研究了江西省广昌县子莲田土壤属性和大量元素含量及其空间变异性。结果表明,广昌县莲田土壤pH平均为4.92,均为酸性土壤,且在子莲种植区变异较小,土壤有机质含量平均为38.20 g/kg;全氮、全磷和全钾含量均值分别为2.16、0.65、24.70 g/kg,碱解氮、有效磷、速效钾和缓效钾含量均值分别为132.00、41.20、109.00、1 000.00 mg/kg。根据临时分级标准,广昌县莲田土壤有机质和有效磷含量较高,碱解氮和速效钾含量较低。土壤有机质和不同形态氮、磷、钾含量在空间分布上有显著差异,有机质、全氮和碱解氮含量变化趋势相似,即南部驿前镇和东部长桥乡较高,北部甘竹镇较低;全磷与有效磷在长桥乡、西部头陂镇含量较高,驿前镇和甘竹镇较低;速效钾含量在中部盱江镇、赤水镇较高,驿前镇含量较低;缓效钾长桥乡较高,驿前镇、甘竹镇较低。更多还原

【Abstract】 Field sampling analysis and geostatistical methods were used to study the soil attributes and the content of macroelements and their spatial variability in seed lotus fields in Guangchang county,Jiangxi province. The results showed that the average pH of lotus field soil in Guangchang county was 4.92,which was acidic soil,and the variation was small in the planting area of seed lotus. The average content of soil organic matter was 38.20 g/kg;The average contents of total nitrogen,total phosphorus and total potassium were2.16,0.65,24.70 g/kg,respectively;The average contents of alkali hydrolyzable nitrogen,available phosphorus,available potassium and slowly available potassium were 132.00,41.20,109.00,1 000.00 mg/kg,respectively. According to the temporary classification standard,the contents of soil organic matter and available phosphorus were higher,and the contents of alkali hydrolyzable nitrogen and available potassium were lower. There were significant differences in the spatial distribution of soil organic matter and different forms of nitrogen,phosphorus and potassium. The change trends of organic matter,total nitrogen and alkali hydrolyzable nitrogen content were similar,that is,Yiqian town in the south and Changqiao town in the east were higher,and Ganzhu town in the north was lower;The content of total phosphorus and available phosphorus in Changqiao town and western Toupo town was higher,and that in Yiqian town and Ganzhu town was lower;The content of available potassium was in Xujiang town and Chishui town in the middle;The content of slowly available potassium in Changqiao township was higher than that in Yiqian town and Ganzhu town.更多还原