浙江省茶园土壤锰含量状况研究

2002年对浙江省部分茶园锰调查结果表明,浙江省茶园全4锰含量0～20cm土层,平均为357.33±265.26mgkg-1,20～40cm土层,平均为361.69±268.69mgkg-1。有效锰含量0～20cm土层,平均为51.16±30.16mgkg-1,20～40cm土层,平均为38.32±25.85mgkg-1,约占全锰含量的15%左右,茶园缺锰率约占30%左右。从上下土层来看,表现出上层锰含量要比下层高。茶树吸收锰与土壤有效锰含量呈极显著正相关,随着叶片的成熟度增加,锰积累增加,同时茎干部也是锰累积的部位。土壤有效锰含量与土壤pH、Al、成土母质有关。

Manganese Concentrations in Tea Garden Soil of Zhejiang Province

The total manganese concentrations in tea garden soil taken from Zhejiang province were 357.33±265.26 mg kg~(-1) and available Mn 51.16±30.16 mg kg~(-1) in 0-20cm depth,while the total Mn of 361.69±268.69 mg kg~(-1) and available Mn of 38.32±25.85mg kg~(-1) were foundin 20-40cm depth. The available Mn accounted for 15% of the total Mn. The depletion rate of Mn in the tea soils was about 30%. In comparison, the Mn concentrations in 0-20cm depth were higher than those in 20-40cm depth. A close correlation was found between the plant-Mn content (y) and the available Mn (x), expressed as: y=8.3393x+1101.5(n=58,r=0.519~(**)).Mn could be accumulated in the tea leaves and stems, thus the older the leaves were, the higher the Mn concentrations were. The Mn concentrations in the soils were correlated to pH, Al and parent materials.