Jiangxi Institute of Red Soil,Nanchang
为了探讨茶园土壤碳、氮、磷含量及生态化学计量特征及其对环境因子的响应,在江西省茶叶主产县不同海拔、种植年限的茶园采集0~20 cm土壤样品,用于测定土壤SOC、TN、TP含量并计算化学计量比。结果表明：(1)茶园土壤SOC、TN含量均值分别为13.84 g/kg、1.37 g/kg,均高于全国土壤平均水平,达到Ⅰ级茶园肥力指标,而土壤TP含量均值为0.47 g/kg,低于全国土壤平均水平,达到Ⅱ级茶园肥力指标。(2)土壤C：N、C：P、N：P均值分别为10.97、32.61、3.49,均低于全国土壤平均水平,表明茶园土壤P具有较高的有效性,而土壤N相对缺乏。(3)随着海拔的增加,土壤SOC含量、C：N、C：P均表现出先减少后增加的趋势,土壤TN含量、TP含量、N：P则变化规律不明显。(4)随着种植年限的增加,土壤SOC含量、TN含量、C：P均表现出增加的趋势,土壤N：P呈现先增加后减少的趋势,土壤C：N呈现先减少后增加的趋势,而土壤TP含量变化规律不明显。建议在茶园经营过程中适当施加氮肥以维持氮磷元素平衡。
In order to investigate the effects environmental factors on characteristics of tea garden soil carbon, nitrogen and phosphorus contents and their ecological stoichiometric, soil samples were collected from the 0~20 cm soil layers of main tea gardens different with altitudes and planting years in Jiangxi Province, which were used to determine soil SOC, TN and TP contents and calculate stoichiometric ratios. The results showed that: (1) the average contents of soil SOC and TN in tea garden were 13.84 g/kg and 1.37 g/kg, respectively, which were higher than the average level of national soil and reached the fertility standard of grade - I tea garden. The average content of soil TP was 0.47 g/kg, which was lower than the average level of national soil and reached the fertility standard of grade - II tea garden. (2) The mean values of soil C : N, C : P and N : P were 10.97, 32.61 and 3.49, respectively, which were lower than the average level of national soil. It showed that soil phosphorus had high availability, while soil nitrogen was relatively deficient. (3) With the increase of altitude, soil SOC content, C : N, and C : P showed a trend of first decreasing and then increasing, while soil TN content, TP content, and N : P showed no obvious change. (4) With the increase of planting years, soil SOC content, TN content and C : P all showed an increasing trend. Soil N : P showed a trend of first increase and then decrease, and soil C : N showed a trend of first decrease and then increase, while the of soil TP content was not obvious. These results can provide reference for judgment of nutrient-limited elements and scientific management of tea gardens in Jiangxi Province. It is suggested that nitrogen fertilizer should be appropriately applied to tea gardens to maintain the balance of nitrogen and phosphorus.
何绍浪,林小兵,黄尚书,等. 江西省茶叶主产县茶园土壤生态化学计量特征[J]. 科学技术与工程, , ():复制