PDF(Pubmed)
Abstract：
UNASSIGNED: With increasing labor shortage and production costs, water scarcity and climate change, there is increased interest in ratooning as a green, resource-efficient technology to boost sustainable rice production, especially in China. Since the performance of ratoon rice (regenerating a second crop from the stubble left in the fields after the main harvest) and the impact of agronomic practices on its yield have shown mixed results across the world, a better understanding is needed to determine under which conditions ratoon rice performs well.
UNASSIGNED: The objectives are (i) to quantify variation in rice yield of main and ratoon crops, (ii) to assess genetic variation in and impact of agronomic practices on rice yield, focusing on the yield of ratoon crop and total yield (main and ratoon crops), and (iii) review of economic and environmental benefits of ratoon rice in comparison with single and double rice cropping.
UNASSIGNED: In researching ratoon rice, we compiled a database from 68 studies published from 2000 to 2023. Descriptive data analysis was performed.
UNASSIGNED: Studies from non-tropical regions account for about 70%. Large variation exists in the yield of ratoon crop across the studies, with lower yield from the tropics than non-tropics. The ratio of yield of ratoon crop to that of main crop also varied widely from 0.13 to 0.67 with 0.36 and 0.5 in tropics and non-tropics, respectively. The yield of ratoon crop was positively related to the yield of main crop, crop duration and nitrogen fertilizer application rate, which were generally higher in non-tropics. Hybrid varieties out-yielded inbred varieties in both main and ratoon crops in non-tropical regions. Direct seeding and AWD had a positive impact on the yield of ratoon crop. The impact of stubble cutting height was mixed. While agronomic nitrogen use efficiency (AEN) during entire ratoon rice cropping was similar to that reported for single rice cropping in previous studies, AEN for ratoon crop in tropical regions tended to be lower than those from previous studies on single rice cropping. Ratoon rice cropping reduced labor input and production cost and increased net economic return compared with double rice cropping.
UNASSIGNED: We propose a research agenda, with the focus on improvement of genetic and agronomic practices to explore the potential of ratoon rice cropping, especially in the tropics.
UNASSIGNED: This study provides insight into the progress in ratoon rice research over the past two decades globally, and specifically in the tropics.
UNASSIGNED: The objectives are (i) to quantify variation in rice yield of main and ratoon crops, (ii) to assess genetic variation in and impact of agronomic practices on rice yield, focusing on the yield of ratoon crop and total yield (main and ratoon crops), and (iii) review of economic and environmental benefits of ratoon rice in comparison with single and double rice cropping.
UNASSIGNED: In researching ratoon rice, we compiled a database from 68 studies published from 2000 to 2023. Descriptive data analysis was performed.
UNASSIGNED: Studies from non-tropical regions account for about 70%. Large variation exists in the yield of ratoon crop across the studies, with lower yield from the tropics than non-tropics. The ratio of yield of ratoon crop to that of main crop also varied widely from 0.13 to 0.67 with 0.36 and 0.5 in tropics and non-tropics, respectively. The yield of ratoon crop was positively related to the yield of main crop, crop duration and nitrogen fertilizer application rate, which were generally higher in non-tropics. Hybrid varieties out-yielded inbred varieties in both main and ratoon crops in non-tropical regions. Direct seeding and AWD had a positive impact on the yield of ratoon crop. The impact of stubble cutting height was mixed. While agronomic nitrogen use efficiency (AEN) during entire ratoon rice cropping was similar to that reported for single rice cropping in previous studies, AEN for ratoon crop in tropical regions tended to be lower than those from previous studies on single rice cropping. Ratoon rice cropping reduced labor input and production cost and increased net economic return compared with double rice cropping.
UNASSIGNED: We propose a research agenda, with the focus on improvement of genetic and agronomic practices to explore the potential of ratoon rice cropping, especially in the tropics.
UNASSIGNED: This study provides insight into the progress in ratoon rice research over the past two decades globally, and specifically in the tropics.
摘要：
■随着劳动力短缺和生产成本的增加，水资源短缺和气候变化，人们对再生绿色越来越感兴趣，促进水稻可持续生产的资源高效技术，尤其是在中国。由于再生稻的表现（从主要收获后留在田间的残茬中再生第二份作物）以及农艺措施对其产量的影响在世界各地显示出不同的结果，需要更好地了解，以确定在何种条件下，再生稻表现良好。
■目标是（i）量化主要和再生作物的水稻产量变化，（ii）评估农艺实践对水稻产量的遗传变异和影响，重点关注再生作物的产量和总产量(主要和再生作物)，（iii）与单季和双季相比，审查了再生稻的经济和环境效益。
■在研究再生稻时，我们从2000年至2023年发表的68项研究中收集了一个数据库.进行描述性数据分析。
■来自非热带地区的研究约占70％。在整个研究中，再生作物的产量存在很大差异，热带地区的产量低于非热带地区。在热带和非热带，再生作物的产量与主要作物的产量之比也在0.13至0.67之间变化很大，分别为0.36和0.5。分别。再生作物的产量与主要作物的产量呈正相关,作物持续时间和氮肥施用量，在非热带地区通常较高。杂交品种在非热带地区的主要作物和再生作物中都是自交品种。直播和AWD对再生作物的产量有积极影响。残茬切割高度的影响是混合的。虽然整个再生稻种植过程中的农艺氮利用效率（AEN）与先前研究中报道的单稻种植相似，热带地区再生作物的AEN往往低于先前对单稻种植的研究。与双季稻相比，再生稻种植减少了劳动力投入和生产成本，增加了净经济回报。
■我们提出了一个研究议程，以改善遗传和农艺实践为重点，探索再生稻种植的潜力，尤其是在热带地区.
■这项研究提供了对过去二十年来全球再生稻研究进展的见解，特别是在热带地区。
■目标是（i）量化主要和再生作物的水稻产量变化，（ii）评估农艺实践对水稻产量的遗传变异和影响，重点关注再生作物的产量和总产量(主要和再生作物)，（iii）与单季和双季相比，审查了再生稻的经济和环境效益。
■在研究再生稻时，我们从2000年至2023年发表的68项研究中收集了一个数据库.进行描述性数据分析。
■来自非热带地区的研究约占70％。在整个研究中，再生作物的产量存在很大差异，热带地区的产量低于非热带地区。在热带和非热带，再生作物的产量与主要作物的产量之比也在0.13至0.67之间变化很大，分别为0.36和0.5。分别。再生作物的产量与主要作物的产量呈正相关,作物持续时间和氮肥施用量，在非热带地区通常较高。杂交品种在非热带地区的主要作物和再生作物中都是自交品种。直播和AWD对再生作物的产量有积极影响。残茬切割高度的影响是混合的。虽然整个再生稻种植过程中的农艺氮利用效率（AEN）与先前研究中报道的单稻种植相似，热带地区再生作物的AEN往往低于先前对单稻种植的研究。与双季稻相比，再生稻种植减少了劳动力投入和生产成本，增加了净经济回报。
■我们提出了一个研究议程，以改善遗传和农艺实践为重点，探索再生稻种植的潜力，尤其是在热带地区.
■这项研究提供了对过去二十年来全球再生稻研究进展的见解，特别是在热带地区。
