油松低效林改造对土壤养分情况的影响  

The Effect of Low Efficiency Forest Transformation of Pinus Tabulaeformis on Soil Nutrient Status

作　　者：刘素荣 Liu Surong(Shanxi Sangganhe Poplar High-Yield Forest Experimental Bureau Forestry Investigation and Design Team,Datong 037045,Shanxi,China)

机构地区：[1]山西省桑干河杨树丰产林实验局林业调查设计队,山西大同037045

出　　处：《林业科技情报》2024年第3期73-75,共3页Forestry Science and Technology Information

摘　　要：为了研究油松低效林改造对土壤养分情况产生的影响,以大同市某一林场油松近熟低效林为例,共配有3个处理点,对改造低效林后各个处理0~20 cm范围内土壤的养分实况进行研究和比较。研究结果证明:对比各处理区域0~20 cm土壤pH和全磷含量之后可知,以上成分没有出现明显的变化(P>0.05);T1组(抚育间伐)土壤全氮、水解氮和全磷数量明显比T2组(林下清理)与对照组(P<0.05)更高;T2组土壤全钾、速效钾和有机质的含量明显比T1组和对照组(P<0.05)更高。在改造油松低效林期间,抚育间伐能够有效提高氮磷在土壤中的含量,林下清理则有利于将有机质和钾素的含量。因此,为更好地对油松低效林土壤的养分情况进行改良,可将抚育间伐和林下清理两种方式相互结合。In order to study the impact of the transformation of low efficiency Chinese pine forests on soil nutrient conditions,taking a near mature low efficiency Chinese pine forest in a certain forest farm in Datong City as an example,three treatment points were set up to study and compare the nutrient conditions of the soil within a range of 0-20 cm after the transformation of low efficiency forests.The research results show that after comparing the pH and total phosphorus content of 0-20 cm soil in each treatment area,it can be seen that there is no significant change in the above components(P>0.05);The total nitrogen,hydrolyzed nitrogen,and total phosphorus in the soil of T1 group(thinning)were significantly higher than those of T2 group(understory clearing)and control group(P<0.05);The content of total potassium,available potassium,and organic matter in the T2 group soil was significantly higher than that in the T1 group and control group(P<0.05).During the transformation of inefficient Pinus tabulaeformis forests,thinning can effectively increase the content of nitrogen and phosphorus in the soil,while clearing the understory is beneficial for reducing the content of organic matter and potassium.Therefore,in order to better improve the nutrient status of soil in low efficiency forests of Pinus tabulaeformis,the two methods of thinning and clearing under the forest can be combined.

关 键 词：低效林改造 土壤养分 油松 林场 

分 类 号：S791.254[农业科学—林木遗传育种] S725[农业科学—林学] S714