• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Workshop of the Australian Centre for International Agricultural Research >Nutrient requirements of rainfed lowland rice in Cambodia
【24h】

Nutrient requirements of rainfed lowland rice in Cambodia

机译：柬埔寨雨量低地米饭的营养要求

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In most rainfed lowlands of Cambodia, soils used for rice cultivation are low in available nitrogen (N), phosphorus (P) and potassium (K), and have low organic matter content and low cation-exchange capacity. Over the last 4 years, areas cultivated to rice have increased substantially from about 1.9 to 2.1 million hectares, of which rainfed lowlands comprise about 88 percent. The average rice yield increased from about 1.2 to 1.8 t ha~(-1), even though nutrient deficiency remains a serious constraint for lowland rice production. The paper reviews current understanding of the nutrient requirements of rainfed lowland rice in Cambodia. Field and greenhouse trials have classified widespread N and P responses and, on sandy soils, K and sulfur responses. Recommended fertilizer rates (in kg ha~(-1)) for rice vary for the different nutrients: for N, from 20 to 120, for P, from 4 to 15, and for K, from 0 to 33. Recommendations are made for each soil type identified in the Cambodian Agronomic Soil Classification system. The need for further work on nutrient requirements of rice and other agricultural crops is also discussed.
机译：在柬埔寨的大多数雨量低地，可用的氮气（N），磷（P）和钾（K）中使用的土壤较低，有机质含量低，阳离子交换能力低。在过去的4年里，耕种的地区大幅增加到约1.9〜210万公顷，其中雨水低地占88％。平均水稻产量增加了约1.2至1.8 t ha〜（-1），即使营养缺乏仍然是低地米生产的严重约束。本文审查了当前对柬埔寨雨量低地米饭的营养需求的认识。领域和温室试验已经分类为广泛的N和P响应，并在沙质土壤中，K和硫反应。推荐的施肥率（以kg ha〜（-1））为不同的营养素而变化：对于n，从20到120，p，从4到15，k，k，从0到33.提出建议柬埔寨农艺土壤分类系统中确定的每种土壤类型。还讨论了进一步研究水稻和其他农作物的营养需求。

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