• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Agricultural Systems >Modelling the effect of groundwater depth on yield-increasing interventions in rainfed lowland rice in Central Java, Indonesia.
【24h】

Modelling the effect of groundwater depth on yield-increasing interventions in rainfed lowland rice in Central Java, Indonesia.

机译：对印度尼西亚中爪哇省雨养低地水稻中地下水深度对增产措施的影响进行建模。

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

Because of drought and nutrient stress, the yields of rainfed lowland rice in Central Java, Indonesia, are generally low and unstable. Variation in groundwater depth can contribute to experimental variability in results of yield-increasing interventions. To test this hypothesis, we used the crop growth simulation model ORYZA2000 to explore the impacts of groundwater depth on the effect of sowing date, tillage, fertiliser-N application and supplementary irrigation on the yield of lowland rice at Jakenan, Central Java, Indonesia. ORYZA2000 was first parameterized and evaluated using data from eight seasons of field experiments between 1995 and 2000. The model adequately simulated the soil water balance, crop growth and grain yield. With shallow to medium groundwater depth (less than 0.5 m deep), rainfed rice yields are close to potential yields with timely sowing in the wet season. With groundwater tables fluctuating mostly between 0.5 and 1.5 m, rainfed yields are 0.5-1 Mg ha-1 lower than potential yields with timely sowing. The decrease in yield with late sowing sets in earlier and proceeds faster with deeper groundwater depths. Deep tillage and supplementary irrigation increase yield more with deep groundwater tables than with shallow groundwater tables, but N fertilisation increases yield more with shallow than with deep groundwater tables. Groundwater depth should be taken into account in the selection of yield-increasing interventions.
机译：由于干旱和营养胁迫，印度尼西亚中爪哇省雨养低地稻的单产普遍较低且不稳定。地下水深度的变化可能导致增产干预措施结果的实验​​变化。为了验证这一假设，我们使用了作物生长模拟模型ORYZA2000，研究了地下水深度对播种期，耕作，施氮肥和补充灌溉对印度尼西亚中爪哇省杰克南的低地水稻产量的影响。首先使用从1995年到2000年的八个季节的田间试验数据对ORYZA2000进行参数化和评估。该模型充分模拟了土壤水分平衡，作物生长和谷物产量。由于地下水深度浅至中等（小于0.5 m），雨季水稻的产量接近潜在产量，并在雨季及时播种。由于地下水位的波动主要在0.5到1.5 m之间，及时播种的雨养单产比潜在单产低0.5-1 Mg ha-1。后期播种会使产量下降的时间提前，而随着地下水深度的增加，产量的下降速度会更快。与浅层地下水位相比，深层耕作和补充灌溉增加的产量要多于浅层地下水，但浅层施肥增加的氮肥产量要比深层地下水多。在选择增产措施时应考虑地下水深度。

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