山核桃免耕经营的经济效益和生态效益
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金(30872047); 浙江省科技厅重大项目(2007C12023); 浙江省自然科学基金重点项目(Z307534); 浙江林学院B类创新团队项目(2007); 浙江林学院博士启动基金(2351000754)资助


Analysis on economic and ecological benefits of no-tillage management of Carya cathayensis
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 文章评论
    摘要:

    免耕经营能够有效的提高经济和生态效益,防止水土流失,保护林下植被和增加土壤有机质。浙江杭州地区山核桃长期免耕,取得良好的经济和生态效益。调查了主产区临安市、淳安县4个重点乡镇,5个重点村和215户的亩产及人均山核桃收入,分析免耕经营前后地壤肥力变化情况。结果表明:4个重点乡镇成林平均亩产山核桃74.68kg,产值2987元/666.7m2,人均山核桃收入7028元;5个重点村平均单产量为95.1kg/666.7m2,产值2800元/666.7m2,人均山核桃收入14818.9元; 215户近4a平均单产量为125.03kg/666.7m2,产值5001元/666.7m2,投入产出之比达1 ∶ 8以上。土壤分析表明,施肥前25a土壤有机质含量、土层厚度保持不变,而全氮、全磷、水解氮、速效磷均缓慢上升;免耕加施肥后,土壤肥力显著提高,产量成倍增加,产量年变异系数由施肥前的39.76%下降到19.60%。由于重点产区山核桃纯林过于集中连片,水源涵养功能下降,病虫害日趋严重;同时存在施肥过量,肥料配比失调,林地土壤含氮量全部超标,含钾量严重不足的问题,今后施肥必须注意"控氮、稳磷、增钾"。

    Abstract:

    Long-term no-tillage management technology of hickory (carya cathayensis) is extended in Hangzhou, Zhejiang and good benefit is obtained. Investigation in the main producing areas of hickory in Lin'an and Chun'an city was carried out. The results showed that the yield was 74.68kg/666.7m2 (2987 yuan/666.7m2) and the per capita income was 7028 yuan in the four key towns, and the yield was 95.1kg/666.7m2 (2800 yuan/666.7m2) and the per capita income was 14,818.9 yuan in the five key villages.The average yield was 125.03kg/666.7m2 (5,001 yuan/666.7m2) and Investment Return Ratio was more than 1 ∶ 8 after random investigation of 215 forest owners for nearly 4 years. In the total costs, the harvesting cost was the largest, more than 51.81%, followed by fertilization (including labor costs) for 27.26%, then spraying for 6.45%, and the others, which consists of peeling costs, saling costs, tending costs, labor costs and so on. For example of Changmo Ling, due to all hickory cultivation process managed by employees, the input-output ratio is only 1 ∶ 3.66. However, the mean income reached 3000 yuan/666.7m2 in 2007. There are 230000 mu of hickory forest lands which produced more than 1.2 billion yuan in Lin'an and the economic benefit was one of the topest in the economic forest in Zhejiang as well as China. No-Tillage management is beneficial to protecting the undergrowth and controlling water and soil erosion. Thus, it improved soil moisture, increased soil organ and maintained nutrient cycling by covering the undergrowth in hickory land after cutting on timely. Soil analysis demonstrated that soil organic content and soil layer unchanged during the unfertilized years, while the total nitrogen, phosphorus and hydrolysable nitrogen increased slowly. Soil fertility was improved. Yield was multiplied. The coefficient of variation decreased from 39.76% to 19.60% between no-fertilization and fertilization. The average yields reached 985.50kg/hm2 after fertilization between 2006 to 2009, which yields of the later was 2.47 times that of the former. The protection and improvement of ecological condition is the basis of high output and efficiency in the hickory forest. The results also made known that pure hickory forest in key producing areas was over-concentrated, water contents declined, pests became more serious in the hickory forest. No-tillage management splits grass cover management of soil layer thickness was 58.0 cm, and often drop to the soil layer of biochemical was 50.6 cm, which fell by 7.4 cm across 5 years.There were also too much fertilization, breaking fertilizer ratio balance which caused excess of nitrogen content and serious shortage of potassium content. Compared 13 soil profiles soil of 2005 to classification standard national green food, total nitrogen and hydrolysable nitrogen were all exceeded, rich levels and moderate levels each were 5, less levels were 3 of hydrolysable nitrogen, no rich levels and less levels were 9 of available kalium. So attention must be paid to "controlling nitrogen, stabling phosphorus, improving potassium" in fertilizer in the near future.

    参考文献
    相似文献
    引证文献
引用本文

王正加,黄兴召,唐小华,黄坚钦,钱莲芳,黎章矩.山核桃免耕经营的经济效益和生态效益.生态学报,2011,31(8):2281~2289

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数: