不同马尾松无性系测定林生物量及养分积累的比较

选择福建漳平五一国有林场7年生马尾松无性系测定林为研究对象,通过对参试40个马尾松无性系不同器官生物量及N、P、K含量的测定,进行不同无性系生物量及养分积累量的比较,结果表明：参试无性系全株生物积累量平均为15.94 kg.株-1,其中M7号无性系的生物量最大,但养分消耗量也较大。M18号无性系的生物产量较高,而N积累量小于平均值的20%,初步判断为N营养利用效率较高基因型。M4、M5、M7、M9、M13、M14、M18、M22、M23、M26和M30无性系的干材生物量大于平均值20%,但P和K营养积累量均小于平均值的20%,属于对林地养分消耗较小的高产无性系。

Comparison of biomass and nutrient accumulation among different test plantations of Pinus massoniana clones

Objected with the 7-year-old clonal test plantations from Zhangping state-owned forestry farm in Fujian province,we tested the biomass and N,P,K content of organs of the tested 40 masson pine clones,and compared the difference of biomass and nutrient accumulation among different tested clones separately.The results showed that the average biological accumulation was 15.94 kg/plant,the accumulation of No.97057 clone was the biggest,but it also cost the most nutrient.No.2D388 clone had higher biological yield,and the N nutrition accumulation was less than 20% mean average,so it was considered as high N utilization genotype.All the stem biomass of No.M4,M5,M7,M9,M13,M14,M18,M22,M23,M26 and M30 clones were more than 20% average value,while P and K nutrition accumulation were less than 20% mean value respectively,which belonged to high yield clones that cost less forest land nutrient.