樟子松人工林凋落物不同混合模式对地力维护的影响  

Effects of litterfall mixing modes on soil improvement in Pinus sylvestris var.mongolica plantation

作　　者：刘敏 郎明翰 杨树军 曹怡立 LIU Min;LANG Minghan;YANG Shujun;CAO Yili(Liaoning Institute of Sandy Land Control and Utilization;Zhanggutai Desert Ecosystem Long-term Research Station,Fuxin 123000,China)

机构地区：[1]辽宁省沙地治理与利用研究所 [2]辽宁章古台科尔沁沙地生态系统国家定位观测研究站,辽宁阜新123000

出　　处：《辽宁林业科技》2022年第3期16-19,共4页Liaoning Forestry Science and Technology

基　　金：国家重点研发计划课题(2017YFD0600505)。

摘　　要：为解章古台沙地樟子松人工林不同混合模式下凋落物对地力的维护能力,采用埋藏分解法测定不同混交模式凋落物的失重率和养分释放率。结果表明,樟子松与阔叶树混交有利于林内凋落物的分解和养分的释放,樟子松与杨树混交的分解速率最快;樟子松与皂角混交的磷释放率最高;樟子松与胡枝子混交的氮释放率最高;樟子松与五角枫混交的有机质释放率最高。综上所述,4种养分中,钾归还的速率最快,归还量最大;各组合模式具有不同的优缺点,因此可根据林分经营需求进行合理搭配。To understand the soil improvement ability of litterfall mixing modes of Pinus sylvestris var.mongolica plantation in Zhanggutai sandy land,the weight loss rate and nutrient release rate of litterfall in different mixing modes were measured by burial decomposition method(BDM).The mixed forest of P.sylvestris var.mongolica and broadleaved trees were beneficial to the decomposition of litterfall and the release of nutrients,and the decomposition rate of mixed mode of P.sylvestris var.mongolica and Populus sp.was the fastest.The phosphorus release rate of P.sylvestris var.mongolica mixed with Gleditsia sinensis was the highest.The nitrogen release rate of P.sylvestris var.mongolica and Lespedeza bicolor was the highest.The organic matter release rate of mixed forest of P.sylvestris var.mongolica and Acer mono was the highest.Among the four nutrients,the nutrient return rate of K was the highest and the return amount was the largest.The effects of litterfall nutrient return on soil improvement had obvious differences among different litterfall mixing modes of P.sylvestris var.mongolica plantations,and it could be reasonably matched according to the requirements of forest management.

关 键 词：樟子松 地力衰退 地力维护 

分 类 号：S724[农业科学—林木遗传育种]