黑土区不同林龄杨树农田防护林土壤养分变化

摘要

为探究不同林龄农田防护林土壤水分养分状况的变化,评价农田防护林对土壤质量的影响.以齐齐哈尔市拜泉县不同林龄LA(26 a)、MA(31 a)、HA(36 a)杨树农田防护林带为研究对象,以弃耕地(KY)为对照,分析不同林龄杨树农田防护林土壤理化性质的变化.结果表明:杨树防护林带的建设增加了土壤养分质量分数,降低了土壤含水量,加大了土壤密度,提高了土壤pH;各杨树农田防护林带土壤有机碳质量分数均高于对照;随着防护林林龄的增加土壤质量越好.%We studied the soil nutrient and water changes of different stage of poplar farmland shelter belts, and evaluated the poplar farmland shelter belts in influencing soil quality.We studied the soil physic-chemical properties changes in different ages(LA(26 a),MA(31 a),and HA(36 a))of poplar farmland shelter belts in black soil region in Baiquan County of Qiqihar City.The poplar farmland shelter belts increased soil nutrient contents, soil bulk density, soil pH, and de-creased soil and water content.Soil organic carbon content was higher than that of the control.With the increase of the for-est age,the soil quality of poplar farmland shelter belts turns higher.