贵州省超高产稻田土壤肥力特征初步研究

Preliminary Study on Soil Fertility Characteristic of Rice Fields with Super-high Yield

为了探讨超高产稻田土壤肥力的增产潜力,对贵州省近几年获得超高产田块的土壤理化性质进行了调查分析。从养分状况、酸碱反应、土壤质地结构等对超高产稻田肥力指标进行描述,侧重土壤肥力角度分析了超高产田块高产稳产的原因。结果表明:超高产田块土壤有机质和速效养分含量高,有机质48.95 mg/kg、全氮2.52 mg/kg、碱解氮193.80 mg/kg、速效磷23.75 mg/kg、速效钾142.87 mg/kg,耕层容重0.96 g/cm3,总孔隙度61.86%,土壤质地以粘壤为主。土壤养分缓冲性能好,生产便于管理。

The physicochemical characteristic of rice fields with super-high yield was analyzed from soil nutrient content,acid-base reaction and soil texture,etc.to investigate the increasing yield potentiality of soil fertility in recent years in Guizhou.The results show that the contents of organic matter,total nitrogen,alkaline nitrogen,available phosphorus,available potassium,tilth volume weight and total porosity are 48.95 mg/kg,2.52 mg/kg,193.80 mg/kg,23.75 mg/kg,142.87 mg/kg,0.96 g/cm3 and 61.86% respectively and the soil texture is mainly loamy soil with the better buffer capacity of soil nutrients.