混农杨树林生长潜力及营养元素循环  

Study on the Productivty Potentiality and Nutrient's Cyclling in the Agro-Forest Plantation

作　　者：姚延梼[1] 白景萍[2] 郝志刚 郑永东 

机构地区：[1]山西农业大学林学系,太谷030801 [2]山西省林业勘测设计院 [3]顺县林业局

出　　处：《山西农业大学学报》1998年第4期310-315,共6页

摘　　要：本文研究了杨树单行混农林、双行混农林、速生丰产林及小老头林的年均生物量及营养元素循环规律 ,结果表明 :a .混、农林具有较高的年均生物量、生产潜力 ;b .各试验林分营养元素的循环规律不同混农林更有利于各元素的活化吸收和利用 ;c.年均各营养元素积累量以单行混农林最高 ,小老头林最低 ,双行混农林及速生丰产林位于二者之间。This paper studied the average biomass and nutrients cycling pattern in SRA,DRA,FGP,and SOP The results show that:1 Agro-forest plantation has higher average biomass,increment productivity potentiality;2 The nutrient's cycling patterns in different stands are different Agro-forest is more favourable for nutrients activation absorption and utilization;3 As to annual average accumulation of nutrient cotent,SRA is the hightest,SOP is the lowest,DSA and FGP are is the middle.

关 键 词：杨树 营养元素 循环单行 混农林 双行混农林 

分 类 号：S792.110.1[农业科学—林木遗传育种]