不同土地利用状况对土壤肥力的影响——以内江市白马镇为例

Effects of Different Land Use Condition on Soil Fertility

根据内江市白马镇5种土地利用类型,采集表层土壤样品172个,共分析测试了有机质、全氮、水解性氮、有效磷、速效钾、阳离子交换量6项土壤养分指标,以了解不同土地利用状况对土壤肥力的影响。结果表明,有效磷含量变化趋势为:果园>灌溉水田>疏林地>望天田>旱地;全氮:望天田>灌溉水田>疏林地>果园>旱地;水解性氮、速效钾、阳离子交换量含量变化趋势相同,均为:望天田>灌溉水田>疏林地>旱地>果园;有机质含量变化趋势为:灌溉水田>望天田>疏林地>果园>旱地。

According to the 5 land use types in Baima Town of Neijiang City, 172 topsoil samples were coUected.7 soil nutrient indices were analyzed, which were organic matter,Total N,hydrolyzable N, rapidly available P, available K, slowly available K and cation exchange capacity, in order to fred out the effects of different land use on soil fertility. Result showed that the change tendency of available P content was orchard 〉 irrigated paddy field 〉 open forest land 〉 non-irrigated field 〉 dry land, that of total N was non-irrigated field 〉 irrigated paddy fieM 〉 open forest land 〉 orchard 〉 dry land.The change trends of hydrolyzable N,available K,slowly available K and cation exchange capacity were the same, which was non-irrigated field 〉 irrigated paddy field 〉 open forest land 〉 dry land 〉 orchard.And the change tendency of organic matter content was irrigated paddy field 〉 non-irrigated field 〉 open forest land 〉orchard〉dry land.