摘要
研究农牧交错带不同土地利用类型与土壤养分的相互关系,可为退耕还林还草、退牧还草,合理利用土地提供科学依据。以位于冀北高原典型的农牧交错带康保县为例,对其3个综合农业区相互毗邻的5种不同土地利用类型进行土样采集,通过土样的化验分析表明,土壤有机质含量为退耕还林地<撂荒地<耕地<退耕还草地<天然草地;土壤全氮含量为退耕还林地<退耕还草地<撂荒地<天然草地<耕地;土壤速效氮含量为退耕还林地<耕地<退耕还草地<天然草地<撂荒地;土壤速效磷含量为天然草地<退耕还林地<退耕还草地<耕地<撂荒地;土壤速效钾含量为退耕还林地<耕地<退耕还草地<天然草地<撂荒地。综合可知,3个不同农业区土壤有机质含量为北部低山丘陵区<中南部波状平原区<东部缓坡丘陵区;土壤全氮含量为北部低山丘陵区<中南部波状平原区<东部缓坡丘陵区;土壤速效氮的含量为北部低山丘陵区<中南部波状平原区<东部缓坡丘陵区;土壤速效磷含量为北部低山丘陵区<东部缓坡丘陵区<中南部波状平原区;土壤速效钾在3个农业区含量相当。对比分析不同农业区土壤养分状况,为合理利用当地的土地资源、改善生态环境、提高当地经济效益提出若干建议。
The study researches the correlations between different land use types and soil nutrition in fanning-pastoral zone, it provides .scientific basis for grain for green land, returning grazing land to grassland and rationally using land. Taking Kanghao County which lies in northern Hebei Plateau as an example, 5 different land use areas in 3 comprehensive agricultural areas were chosen and sampled, through test analysis of soil samples, the result shows that soil organic matter content is as follows： the new afforestation land 〈 the abandoned land 〈fannland 〈 grain for green land 〈 natural grassland. Soil total nitrogen content is as follows： the new afforestation land 〈 land as returning fannland to grassland grain for green land 〈 the abandoned land 〈 natural grassland 〈 farmland. Soil available N content is as follows ： the new afforestation land 〈 farmland 〈 grain for green land 〈 natural grassland 〈 abandoned land. While soil available P is as follows： natural grassland 〈 the new afforestation land 〈 grain for green ＇land 〈 farmland 〈 abandoned land, soil available potassium as the new afforestation land 〈 farmland 〈 grain for green project 〈 natural grassland 〈 abandoned land. Soil organic matter content increases as follows： northem hilly region 〈 central-south zone 〈 east hilly region. And the stone trend as soil total P and avail- able N content. Soil available P content increase as follows： northern hilly region 〈 east hilly region 〈 central-south zone. But soil available K content seems more or less the same among these 3 areas. Through comparison analysis on soil nutrition situation in different agricultural areas, the study puts forward some suggestions on improving ecological environment and enhancing local economic benefits.
出处
《安徽农业科学》
CAS
北大核心
2009年第17期8119-8121,共3页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(40671006)
关键词
农牧交错带
土地利用类型
土壤养分
康保县
Fainting-pastoral zone
Land use types
Land nutrition
Kangbao County
