昆明宜良尖山云南松林的土壤理化特性

发布时间：2018-04-01 16:44

本文选题：云南松　切入点：土壤　出处：《云南农业大学学报(自然科学)》2017年01期

【摘要】：为了解云南松(Pinus yunnanensis)林下土壤理化特征,在昆明宜良尖山,于2012年旱季的2月中旬取7块样地的28个土样(每块样地2个样点,每样点分0~20和20~40 cm土壤层各取一个土样),测定土壤理化性状指标。结果显示:0~20与20~40 cm样层中,(1)土壤含水量、容重分别为8.2%~10.2%、1.19~1.46 g/cm3与8.9%~13.6%、1.45~1.68 g/cm3;(2)pH值和有机质分别为4.0~4.5、28.0~44.6g/kg与4.1~4.9、5.9~19.6 g/kg;(3)总氮、磷、钾分别为1.0~1.8 g/kg、0.15~0.39 g/kg、5.0~23.7 g/kg与0.3~1.1 g/kg、0.15~0.36 g/kg、5.2~24.8 g/kg;(4)有效氮、磷、钾分别仅为80.0~125.0 mg/kg、0.57~3.18 mg/kg、67.5~130.5 mg/kg与23.0~69.0 mg/kg、0.00~0.54 mg/kg、67.0~128.5 mg/kg。土壤理化特性随样地生境和土壤样层的不同而呈现多样性的变化。有效氮、磷、钾与有机质含量呈显著或极显著的正相关(P0.05或0.01)。尖山林区云南松林下土壤偏干、偏酸、黏重、低磷少氮,偏干和低磷也许是天然更新云南松蹲苗和幼树期生长缓慢的重要成因构成。
[Abstract]:In order to understand the soil physical and chemical characteristics of Pinus yunnanensis, 28 soil samples from 7 plots (2 plots per plot) were collected in Yiliang Jianshan, Kunming, in the middle of February of 2012. One soil sample was taken from 0 ~ 20 and 20 ~ 40 cm soil layers, and the physical and chemical properties of the soil were measured. The results showed that the soil water content in the 0 ~ (20) and 20 ~ (40) cm soil layers was (1)) the bulk weight was 8.22 ~ (10. 2) 1.19 ~ (1.46 g/cm3) and the pH value was 13.61.451.68 g / cm ~ (3) C ~ (2 +) and the organic matter were 4.0 ~ 4.54.528.0 g / kg and 4.14 ~ 94.919.6 g / kg 路kg ~ (-1) N, P, P, respectively. The available nitrogen, phosphorus and potassium were 1.0 / 1.8 mg / kg / kg / kg 0.39 g / kg / kg 0.39 g / kg / kg ~ 5.03.7 g/kg and 0.31.1 g / kg / kg ~ 0.36 g / kg / kg ~ 0.36 g / kg / kg ~ 0.36 g 路kg ~ (-1) 路kg ~ (-1) N, P, K = 80.0 ~ 125.0 mg / kg / kg ~ 0.573.18 mg 路kg ~ (-1) mg/kg respectively. The soil physical and chemical properties varied with the different habitats and soil layers. There was significant positive correlation between potassium and organic matter content (P0.05 or 0.01). The soil of Pinus yunnanensis forest in Jianshan forest area was dry, acid, sticky, low phosphorus and low nitrogen. Dry and low phosphorus may be the important factors for the slow growth of Pinus yunnanensis squat seedlings and young trees.
【作者单位】：西南林业大学林学院;西南林业大学研究生院;禄丰村林场;
【基金】：国家自然科学基金项目(31170585)
【分类号】：S791.257;S714.2

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