• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Australian Journal of Soil Research >Organic amendments initiate the formation and stabilisation of macroaggregates in a high clay sodic soil
【24h】

Organic amendments initiate the formation and stabilisation of macroaggregates in a high clay sodic soil

机译：有机改性剂可引发高黏性钠钙土中大骨料的形成和稳定化

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

Subsoil constraints present a substantial problem for crop production in many agricultural regions. In particular, soils in temperate grain production areas of Australia are often poorly structured due to high content of sodic clay. An alternative to the standard practice of addition of gypsum is to incorporate organic amendments deep into the subsoil. An incubation experiment was performed for 174 days using several organic amendments. These consisted of wheat shoots, lucerne pellets, canola and chickpea stubbles, chicken manure, peat, and sawdust. Gypsum, an inorganic amendment commonly applied to sodic soil, was included for comparison. The change over 174 days in soil structural properties was measured using wet-sieving. Formation of slaking-resistant macroaggregates >2mm was most rapid with 'green plant material', wheat and lucerne, while the 'stubbles' were markedly slower in obtaining the equivalent level of aggregation. However, the largest growth in aggregates after day 56 was shown by the 'stubble' and chicken manure amended soils. The gypsum amendment was not capable of forming large, slaking-resistant aggregates >2mm; this may be attributed to the inability of gypsum to stimulate soil biological processes. Peat and sawdust failed to initiate slaking-resistant macroaggregates. The study demonstrated that a variety of organic amendments have the ability to improve the physical fertility of sodic subsoil, and in the case of the green plant materials within 1 week of incubation.
机译：地下土壤的限制给许多农业地区的农作物生产带来了重大问题。特别是，由于温和粘土含量高，澳大利亚温带谷物产区的土壤结构通常较差。添加石膏的标准做法的另一种替代方法是将有机改良剂深深地掺入土壤中。使用多种有机修饰剂进行了174天的孵育实验。其中包括小麦芽，卢塞恩颗粒，低芥酸菜子和鹰嘴豆残茬，鸡粪，泥炭和锯末。石膏是一种通常用于钠盐土壤的无机改良剂，用于比较。使用湿筛分法测量了174天土壤结构特性的变化。使用“绿色植物材料”，小麦和卢塞恩，> 2mm的耐崩解大团聚体形成最快，而“残茬”在获得同等集聚水平时明显较慢。但是，第56天后聚集体最大的增长表现为“残茬”和鸡粪改良土壤。石膏改良剂不能形成大于2mm的大的抗结块的骨料。这可能是由于石膏不能刺激土壤生物过程。泥炭和木屑未能引发耐崩解的大型骨料。该研究表明，多种有机改良剂能够改善苏打底土的物理肥力，并且对于绿色植物材料，在孵育1周之内即可。

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