| 坡度对油茶林土壤氮磷钾含量与剖面分布特征的影响 |
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| 引用本文： | 黄安香,周显勇,杨守禄,姬宁,朱亚艳,许杰,张彦雄.坡度对油茶林土壤氮磷钾含量与剖面分布特征的影响[J].中国农学通报,2020,36(34):25-31. |
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| 作者姓名： | 黄安香 周显勇 杨守禄 姬宁 朱亚艳 许杰 张彦雄 |
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| 作者单位： | 贵州林业科学研究院,贵阳 550005 |
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| 基金项目： | 贵州省科技支撑计划“贵州油茶团队服务企业行动计划”(黔科服企[2018]4003号);贵州省科技支撑计划“贵州省油茶工程技术研究中心”(黔科合平台人才[2018]5252号);贵州省科技成果转化“油茶优质丰产栽培技术体系研究”(黔科合成果[2017]4133);贵州省林业项目“功能型生物炭竹生物炭修复土壤镉污染的机制解析”(黔林科合J字[2019]07号);贵州省林业项目“功能化油茶果壳复合材的制备关键技术研究”(黔林科合[2019]03号);贵州省林业项目“绿色竹质家居与装配式建筑制造技术研究”(黔林科合[2019]05号) |
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| 摘 要： | 为阐明坡度和土壤深度对油茶林土壤氮(N)、磷(P)、钾(K)和有效NPK的影响及其分布特征,采集不同坡度(0°、18°、43°)和剖面深度(0~60 cm)土壤,分析土壤养分含量差异及其分布特征。结果表明,3个坡度土壤NPK全量分别为0.60~1.13、0.62~0.65、27.53~32.27 g/kg,速效NPK分别为89.81~145.00、3.05~8.52、104.06~196.30 mg/kg。多重比较分析表明,不同坡度的油茶林地土壤NPK全量和速效量差异显著(P<0.05),除全钾外,不同坡度0~60 cm的土层NPK全量和速效量剖面分布趋势类似。随着坡度的增大和土壤深度的加深,NPK肥力逐渐减弱,分布具有表聚性。土壤肥力状况表现为坡度越高,NPK养分普遍偏低;随着剖面深度加深,土壤肥力逐渐降低,30 cm以下剖面土壤肥力低。相关性分析表明,NPK全量和有效量呈显著正相关。0°—18°坡面适宜种植油茶树,43°坡及以上坡度的土壤肥力低,不适宜种植油茶树。该研究结果对贵州山区油茶选育栽培具有一定的应用价值。
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| 关 键 词： | 土壤 坡度 油茶林地 土壤剖面 养分分布 NPK |
| 收稿时间： | 2020-01-20 |
Camellia oleifera Forest Land: NPK Content and Distribution Characteristics in Soil Profile Under Different Slopes |
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| Huang Anxiang,Zhou Xianyong,Yang Shoulu,Ji Ning,Zhu Yayan,Xu Jie,Zhang Yanxiong.Camellia oleifera Forest Land: NPK Content and Distribution Characteristics in Soil Profile Under Different Slopes[J].Chinese Agricultural Science Bulletin,2020,36(34):25-31. |
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| Authors: | Huang Anxiang Zhou Xianyong Yang Shoulu Ji Ning Zhu Yayan Xu Jie Zhang Yanxiong |
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| Institution: | Guizhou Academy of Forestry, Guiyang 550005 |
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| Abstract: | To clarify the fertilizer supply capacity and distribution characteristics of N, P and K in soil of Camellia oleifera forest land, soil samples from different slopes (0°, 18°, 43°) and profile depths (0-60 cm) were collected to analyze the NPK nutrient contents and profile distribution characteristics under different site conditions. The results showed that the content of total NPK in the three slopes was 0.60-1.13, 0.62-0.65 and 27.53-32.27 mg/kg, respectively, and the content of available NPK was 89.81-145.00, 3.05-8.52 and 104.06-196.30 mg/kg, respectively. Multiple comparative analysis showed that there were significant differences in the total and available NPK in Camellia oleifera forest land at different slopes (P<0.05). The distribution characteristics of total NPK and available NPK in soil were similar, except total K, with the soil profile deepening and soil depth increasing, the soil fertility gradually decreased, and the distribution was surface accumulation. Analysis of soil fertility showed that the higher the slope, the lower the NPK nutrients. Correlation analysis showed that the total NPK were significantly correlated with available NPK. According to the comprehensive analysis, the slope of 0°-18° is suitable for planting Camellia oleiensis, but the slope of 43° and above is not suitable because of low soil fertility. The results could have certain application value in breeding and cultivation of Camellia oleifera in mountainous areas of Guizhou. |
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| Keywords: | soil slope gradient Camellia oleifera forest soil profile nutrient distribution NPK |
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