| 油茶间作不同绿肥的土壤分形及养分损耗特征 |
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| 引用本文： | 丁怡飞,曹永庆,姚小华,傅松玲,张平安,楼新良.油茶间作不同绿肥的土壤分形及养分损耗特征[J].安徽农业大学学报,2018,45(5):867-871. |
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| 作者姓名： | 丁怡飞 曹永庆 姚小华 傅松玲 张平安 楼新良 |
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| 作者单位： | 安徽农业大学林学与园林学院,合肥230036;中国林业科学研究院亚热带林业研究所,富阳311400;中国林业科学研究院亚热带林业研究所,富阳,311400;安徽农业大学林学与园林学院,合肥,230036;青田县林业局,青田,323900;磐安县林业局,磐安,322300 |
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| 基金项目： | 浙江省省院合作林业科技项目“浙江省油茶林地高效复合经营技术研究与示范”（2014SY03）资助。 |
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| 摘 要： | 为探讨油茶林间作不同绿肥对耕作层土壤颗粒分形特征及养分退化产生的影响，在野外调查与室内分析的基础上，分析了间作不同绿肥下油茶林的土壤颗粒分形维数及其与土壤粒径分布、养分含量的关系。结果表明：（1）该区域土壤粒径分布主要以粘粒（＜0.002 mm）和粉粒（0.002～0.05 mm）为主，土壤分形维数为2.681~2.882，顺序为：CK＜黑麦草＜鼠茅草。（2）研究区土壤体积分形维数与粘粒（<0.002 mm）体积百分含量呈极显著正相关关系（P＜0.01），与粉粒（0.002～0.05 mm）体积百分含量呈显著正相关（P＜0.05），与砂砾（0.05～2.00 mm）体积百分含量呈显著负相关关系（P＜0.05）；分形维数与土壤含水量呈显著正相关（P＜0.05），而与有机质、全氮、水解性氮、全磷、有效磷、全钾、速效钾及土壤容重的相关性未达到显著水平（P＞0.05）。（3）3月至8月，两种绿肥间作均显著提高了油茶林耕作层土壤的含水量，减少了养分的损耗，其中以鼠茅草改良效果最好。综上，土壤分形维数能够很好地表征土壤质地、粒径组成以及土壤养分状况，为油茶林地复合经营土壤质量评价提供一定的参考。
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| 关 键 词： | 油荼 绿肥 体积分形维数 养分损耗 |
Characteristics of soil fractal and nutrient loss in Camellia oleifera forest intercropping with different green manure plants |
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| DING Yifei,CAO Yongqing,YAO Xiaohu,FU Songling,ZHANG Pingan and LOU Xinliang.Characteristics of soil fractal and nutrient loss in Camellia oleifera forest intercropping with different green manure plants[J].Journal of Anhui Agricultural University,2018,45(5):867-871. |
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| Authors: | DING Yifei CAO Yongqing YAO Xiaohu FU Songling ZHANG Pingan and LOU Xinliang |
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| Institution: | School of Forestry and Landscape, Anhui Agricultural University, Hefei 230036; Institute of Subtropical Forestry, China Academy of Forestry, Fuyang 311400,Institute of Subtropical Forestry, China Academy of Forestry, Fuyang 311400,Institute of Subtropical Forestry, China Academy of Forestry, Fuyang 311400,School of Forestry and Landscape, Anhui Agricultural University, Hefei 230036,Qingtian County?Bureau of Forestry, Qingtian 323900 and Panan County Bureau of Forestry,Panan 322300 |
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| Abstract: | In order to explore the effects of different green manure plants on the soil particle fractal characteristics and nutrient degradation in the plough layer of Camellia oleifera forest, based on field investigation and indoor analysis, the fractal dimension of soil particles and its relationship with soil particle size distribution and nutrient content were analyzed in different green manures intercropping with C. oleifera. The results showed that: (1) The soil particle size distribution mainly consisted of clay (<0.002 mm) and slit (0.002-0.05 mm) from this region, and the fractal dimension of soil was from 2.681 to 2.882, and ranked in order of CK 0.01 level, and it had a positive correlation between 0.002-0.05 mm silt at the 0.05 level, while it had a negative correlation between 0.05-2.00 mm gravel at the 0.05 level. The fractal dimension was positively correlated with the soil water content at the 0.05 level, but the correlation with organic matter, total nitrogen, hydrolytic nitrogen, total phosphorus, available phosphorus, total potassium, available potassium and soil bulk density did not reach a significant level(P>0.05). (3) From March to August, the two kinds of green manures intercropping significantly improved the water content and reduced the loss of nutrients of topsoil soil in C. oleifera forest, in which the improvement effect of rat thatch was best. In comprehensive, the fractal dimension of soil can characterize soil texture, particle size composition and soil nutrient status well, and it can provide some reference to soil quality evaluation in compound management?of C. oleifera forest. |
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| Keywords: | Camellia oleifera green manure volume fractal dimension nutrient loss |
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