贵州安顺地区耕地土壤养分调查分析.

Soil nutrient is the basis for stable and high crop yield. Mastering soil's nutrient content of cultivated land is the precondition for　implementing soil test and formula fertilization. Investigations of soil's pH value and nutrient of vegetable land, paddy field and fruit land in Guizhou Anshun area were carried out in this paper. The results showed that soil's pH value of cultivated land in Guizhou Anshun area was lower than 7, and the soil was overall acidic; soil nutrient was sufficient, the organic matter, total nitrogen, total phosphorus and total kalium content were in the middle and upper level, but there were significant differences among different districts. The pH value was 5.75 on average and the range of measurement was 4.65-6.2; the value of organic matter on average was 31.13g/kg and the range of measurement was 13.07-94.55g/kg; the value of total nitrogen was 1.74g/kg on average and the range of measurement was 0.73-3.97g/kg; the total phosphorus value was 0.998g/kg on average and the range of measurement was 0.44-1.91g/kg; potassium value was 16.5g/kg on average and the range of measurement was 2.5-42.5g/kg. The soil's pH value for Guanling > Pingba > Puding > Ziyun > Zhenning ≥ Xixiu, the content of organic matter for Xixiu > Puding > Guanling > Ziyun > Pingba > Zhenning, the content of total nitrogen for Xixiu > Guanling > Ziyun > Puding > Pingba > Zhenning, the content of total phosphorus Puding > Guanling > Zhenning > Pingba > Ziyun > Xixiu, the content of total kalium for Puding > Pingba > Zhenning > Guanling > Xixiu > Ziyun. The difference of nutrients in different soil types was significant. The main nutrient content was highest in paddy soil, lowest in fruit land，and vegetable soil's nutrient was in between. There was a significant difference with the same soil type and the same nutrient content. The difference was the largest in organic content and was small in other nutrients. Therefore, this investigation has basically mastered the cultivated land soil's pH value and organic matter, total nitrogen, total phosphorus and total kalium content and distribution in Anshun, which can provide the decision-making reference for soil test and formula fertilization in regional land. [ABSTRACT FROM AUTHOR]