...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Italian Journal of Agronomy >Direct and Residual Effects of Organic Fertilisation on Crop Yields and Soil Organic Matter Content
【24h】

Direct and Residual Effects of Organic Fertilisation on Crop Yields and Soil Organic Matter Content

机译：有机肥对作物产量和土壤有机质含量的直接和残留效应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Raising the organic matter in soil is useful both from agricultural and environmental standpoint. Manure recycling seems particularly suitable for this task. However it is difficult to find the optimal rate because manuring is expensive and environmentally risky (Campbell et al., 2001). Manure benefits should be long lasting for its high content of humic substances. Direct and residual effects of manure supplied to various rotations have been studied for 36 years in the fertile Po Valley, near Bologna. A long-term trial, which started in 1966 and is still in progress at Cadriano (Bologna), tests rainfe'd rotations with different levels of cattle manure supply. A 9-year rotation (3 cycles of corn-wheat alternated with a 3-years alfalfa meadow), a 2-year rotation (corn-wheat), continuous corn and continuous wheat, are compared at three intensities of manuring (MO, Ml, M2), corresponding to 0, 20 and 40 t ha~(-1) year~(-1) of fresh material, respectively, without inorganic fertilizers. Plots are arranged according to a split-plot design replicated twice (56 m~2 sub-plots). In 1984 (after two cycles of the 9-year rotation) M2 supply was interrupted to study manure residual influence. In the trial crop yields are annually assessed and the soil (silty loam, low in organic matter) is sampled to 0.4 m depth for organic matter analysis (Walkley-Black acid digestion method).
机译：从农业和环境的角度看，提高土壤中的有机物都是有用的。粪肥回收似乎特别适合此任务。但是，由于肥料价格昂贵且具有环境风险，因此很难找到最佳比例（Campbell等，2001）。由于腐殖质含量高，粪便的益处应持久。在博洛尼亚附近肥沃的波谷，研究了不同轮作肥料的直接和残留效应已有36年了。一项长期试验始于1966年，至今在卡德里亚诺（博洛尼亚）仍在进行中，该试验测试了不同水平的牛粪供应情况下的降雨轮作。比较了三种强度（MO，Ml）下的9年轮作（3个玉米小麦周期与3年苜蓿草地交替），2年轮作（玉米小麦），连续玉米和连续小麦。 （M2），分别对应于0、20和40吨公顷（-1）年〜（-1）的新鲜材料，不含无机肥料。根据重复绘制两次的分割图设计（56 m〜2个子图）排列图。在1984年（经过9年轮换的两个周期之后），M2供应中断，以研究粪便残留影响。在试验中，每年评估作物产量，并取样土壤（粉质壤土，有机质含量低）至0.4 m深度，以进行有机质分析（Walkley-Black酸消解法）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号