信阳市典型水稻土的养分状况及施肥对策——以商城县为例

Nutrient Condition and Countermeasures of Typical Paddy Soil in Xinyang City:Taking Shangcheng County as an Example

为了解信阳市水稻土的养分状况,探寻出相应的施肥对策,以商城县为例,通过野外调查采样与室内试验分析,对信阳市典型水稻土区的pH值、水解氮、铵态氮、速效磷、速效钾等进行测定。结果表明:商城县水稻土水解氮平均值为4.12 mg/kg,速效磷平均值为5.93mg/kg,速效钾平均值为47.3 mg/kg,pH值为6.26。商城县的水稻土属于黄棕壤潴育型水稻土与潜育型水稻土,速效磷与速效钾含量均为IV级,中等稍偏下水平,整体养分状况属于中等水平。针对该地区的土壤养分状况存在的问题,提出了改善土壤肥力状况的施肥对策。

In order to learn the paddy soil nuturient state of Xinyang City and further to explore development strategies. This paper took Shangcheng County as research object to determinate pH value,hydrolyzable nitrogen ,ammonium nitrogen ,rapid available phosphorus ,and rapidly available potassium etc. by sampling and investigation in field and laboratory analysis. The results were as follows ,the average hydrolyzable nitrogen of typical paddy soil in Shangcheng County is 4.12 mg/kg,the average rapid available P is 5.93 mg/kg,the average rapidly available K is 47.3 mg/kg and pH value is 6.26. The paddy soil of Shangeheng County is belong to yellow brown soil and storage type;rapid available P and rapid available K are Ⅳ. The overall nutrient status is moderate. Aiming at the existing problem of the region＇s soil nutrient status ,this paper put forward some countermeasures to improve soil fertility.