落叶松人工林土壤衰退趋势

Tendency of Soil Degradation in the Pure Larch Plantations.

落叶松人工林土壤衰退趋势＊阎德仁王晶莹杨茂仁（内蒙古林业科学研究院，呼和浩特０１００１０）ＴｅｎｄｅｎｃｙｏｆＳｏｉｌＤｅｇｒａｄａｔｉｏｎｉｎｔｈｅＰｕｒｅＬａｒｃｈＰｌａｎｔａｔｉｏｎｓ．ＹａｎＤｅｒｅｎ，ＷａｎｇＪｉｎｇｙｉｎｇ，ＹａｎｇＭａｏ...

he problems of the soil degradation including the content of soil nutrients, humus properties, soil enzyme activity and soil microorganism in pure larch plantations were studied. Mainwhile, the researches of affection of the soil fertility properties in cutting stand, the second rotation stand, and mixture planting were also carried out. Based on analysis of the reasons of causing soil degradation in the pure larch plantations, some appropriate countermeasures of prevention were put forward.