摘要
为明确河北省山前平原高产类型区耕地土壤养分状况及土壤肥力演变规律,利用河北省第2次土壤普查数据及河北省耕地质量监测数据,对土壤养分状况进行了系统分析。结果表明,第2次全国土壤普查时,河北省山前平原高产类型区土壤有机质、全氮及速效磷含量均处在低至极低水平,平均含量分别为10.45 g/kg,0.68 g/kg,7.50 mg/kg;土壤速效钾含量较高,为191.50 mg/kg。从土壤养分状况变化趋势看,土壤有机质含量由第2次土壤普查的10.45 g/kg提高到2014—2015年的19.50 g/kg,增长86.60%;土壤全氮含量由0.68 g/kg提高到1.18 g/kg,增长72.79%,全氮含量水平由5级上升到3级水平,达到中等水平;土壤速效磷含量由第2次土壤普查的7.50 mg/kg提高到2014—2015年的16.75 mg/kg,增长123.33%,速效磷含量水平由4级上升到3级水平,达到中等水平;土壤速效钾含量由第2次土壤普查的191.50 mg/kg下降到1998—1999年的65.50 mg/kg,下降65.80%,速效钾含量水平由2级下降到4级水平,速效钾含量偏低。1998—2015年,随着钾肥投入增加,河北省山前平原高产类型区土壤速效钾含量呈上升趋势,由65.50 mg/kg提高到128.50 mg/kg。速效钾含量水平中等偏下,仍需要继续培肥,加强平衡施肥及秸秆还田技术的推广应用。
In order to determine soil nutrient status and soil fertility evolution rule of high yield fields in piedmont plain of Hebei province, soil nutrient status were analyzed with the data of ＂the Second National Soil Survey＂ and cultivated land quality monitoring in Hebei province. The results showed that the organic matter content, total N content and olsen- P content of high yield type area in piedmont plain of Hebei province were low to extremely low levels in the Second National Soil Survey, the average contents were 10.45 g/kg, 0.68 g/kg, 7.50 mg/kg, respectively. The content of soil available K had high level, the average content was 191.50 mg/kg. From the trend of fertility quality variation, soil organic matter content increased from 10.45 g/kg in the Second National Soil Survey to 19.50 g/kg in 2014-2015, increased by 86.60%. Soil total nitrogen content increased from 0.68 g/kg to 1.18 g/kg, increased by 72.79%, the level of total nitrogen content from level 5 to level 3, reached a moderate level. The content of soil available phosphorus increased from 7.50 g/kg in the Second National Soil Survey to 16.75 mg/kg in 2014-2015, increased by 123.33%, the level of available phosphorus content from level 4 to level 3, reached a moderate level. Soil available potassium content decreased from 191.50 mg/kg in the Second National Soil Survey to 65.50 mg/kg in 1998-1999, decreased by 65.80%, the level of available potassium content from level 2 to level 4,the content was low. With the increase of K fertilizer input, soil available potassium had an increasing trend in high yield type area of piedmont plain of Hebei province in 1998-2015, soil available potassium increased from 65.50 mg/kg to 128.50 mg/kg. From the level of available potassium content, at present the content of available potassium was on a lower-middle level in this area, in order to enhance balanced fertilization and straw returning technology, we should continue to cultivate fertilizer.
出处
《山西农业科学》
2016年第11期1664-1668,共5页
Journal of Shanxi Agricultural Sciences
基金
河北省财政专项(F16E01)
关键词
河北省山前平原
土壤养分状况
有机质
全氮
速效磷
速效钾
piedmont plain of Hebei province
soil nutrient status
organic matter
total N
olsen- P
available K
