吉林省梨树县土壤养分的时间变化特征研究

为了探明自第二次土壤普查以来,吉林省梨树县黑钙土和风沙土有机质和氮、磷、钾的变异特征,以及在2007年实施秸秆全覆盖还田耕作技术后,对两种土壤类型有机质和氮、磷、钾的影响.于2009-2011年在梨树县高家村的黑钙土和付家街村的风沙土上连续3年进行定位取样,测定土壤中的有机质和碱解氮、有效磷、速效钾.结果表明:高家村的黑钙土自第二次土壤普查以来土壤有机质和氮、磷、钾分别增加了0.35％、36.75 mg/kg、47.03 mg/kg、196.42 mg/kg,付家街村的风沙土有机质减少了0.38％,氮、磷、钾分别增加了25.34、41.11、88.23 mg/kg.2009-2011年实施秸秆全覆盖还田耕作技术后,3年间黑钙土和风沙土有机质分别增加了0.25％和0.49％,两种土壤的氮、磷、钾含量有所下降.

Temporal variation characteristics of soil nutrient in Lishu county of Jilin province

To explore the variation characteristics of soil organic matter and N, P, K of chernozem soil and aeolian sandy, since the second soil survey in Lishu county of Jilin province. And to investigate the effects of two types of soil organic matter and N, P, K, since the implementation of whole straw mulching cultivation technique in 2007. Collecting the sample that is chernozem soil of Gaojia village and aeolian sandy soil of Fu Jiajie village in three consecutive years, in order to determine the organic matter and N, P, K in 2009-2011. The results showed that: The organic matter and N, P, K of chernozem soil were respectively increased by 0.35%, 36.75 mg/kg,47.03 mg/kg, 196.42 mg/kg, since the second soil survey. The organic matter of aeolian sandy soil was reduced by 0.38%, N, P, K were respectively increased by 25.34 mg/kg, 41.11 mg/kg and 88.23 mg/kg. Since the implementation of whole straw mulching cultivation technique in 2009-2011, the organic matter of chernozem soil and aeolian sandy soil were increased by 0.25% and 0.49%, and the contents of N, P, and K decreased in three years.