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Productivity and water use of ratoon rice cropping systems with water-saving, drought-resistant rice
Agronomy Journal ( IF 2.1 ) Pub Date : 2022-05-04 , DOI: 10.1002/agj2.21099
Fangzhao Xia 1 , Wukai Wang 1 , Yulin Weng 1 , Ihsan Ali 1 , Jinsong Zhao 2 , Zhongnan Nie 3 , Xinghua Li 4 , Xuan Yao 1 , Tewu Yang 1
Affiliation  

Water-saving, drought-resistant rice (WDR) (Oryza sativa L.) is a type of new rice cultivars with high drought resistance and low water consumption in the production phase. Ratoon rice cropping is regarded as a resource-efficient rice production system with low cost and high profit. The development of ratoon rice system with WDR is conducive to the sustainable production of rice and the expansion of rice plantation; however, no such attempt has been made. In this study, a field experiment was conducted for 2 yr to evaluate the feasibility of developing new ratoon rice cropping systems using WDR compared with using common lowland rice (CLR). The productivity, regenerative capacity, and water use efficiency (WUE) were investigated in the water-saving cultivation system using two WDR cultivars—Jieyou 652 and Jieyou 804—and in the conventional flooding cultivation system using the CLR cultivar Fengliangyouxiang 1. The irrigation WUE for the WDR systems was 89.8–214.8% and 243.4–765.6% higher than for the CLR system in the main and ratoon cropping seasons, respectively. The grain yield was not significantly different in the main cropping season between the WDR and CLR systems; nevertheless, it was lower in the WDR systems because of shorter growth duration and smaller panicles in the ratoon season. Higher accumulations of dry matter (DM), nonstructural carbohydrates (NSCs), and nitrogen in the stubble of main-season crops is helpful to the promotion of regenerative capacity of WDR in the ratoon season.

中文翻译:

再生稻节水抗旱水稻种植系统的生产力和用水量

节水抗旱水稻 (WDR) ( Oryza sativaL.)是一种抗旱性高、生产阶段耗水量低的水稻新品种。菝葜种植被认为是一种资源节约型、成本低、利润高的水稻生产系统。WDR再生再生稻系统的发展有利于水稻的可持续生产和水稻种植面积的扩大;但是,没有进行过这样的尝试。在这项研究中,进行了为期 2 年的田间试验,以评估使用 WDR 与使用普通低地稻 (CLR) 相比开发新的宿根稻种植系统的可行性。生产力、再生能力、采用两种 WDR 品种——洁优 652 和洁优 804 的节水栽培系统和使用 CLR 品种丰良优香 1 号的常规淹水栽培系统,研究了 WDR 和水分利用效率 (WUE)。WDR 系统的灌溉 WUE 为 89.8在主季和宿根季,分别比 CLR 系统高出 –214.8% 和 243.4–765.6%。WDR和CLR系统在主要种植季节的粮食产量没有显着差异;然而,在 WDR 系统中它较低,因为在宿根生长期间较短的生长持续时间和较小的圆锥花序。主季作物残茬中干物质(DM)、非结构性碳水化合物(NSCs)和氮的较高积累有助于提高WDR在宿根季节的再生能力。WDR 系统的灌溉 WUE 在主季和宿根种植季节分别比 CLR 系统高 89.8-214.8% 和 243.4-765.6%。WDR和CLR系统在主要种植季节的粮食产量没有显着差异;然而,在 WDR 系统中它较低,因为在宿根生长期间较短的生长持续时间和较小的圆锥花序。主季作物残茬中干物质(DM)、非结构性碳水化合物(NSCs)和氮的较高积累有助于提高WDR在宿根季节的再生能力。WDR 系统的灌溉 WUE 在主季和宿根种植季节分别比 CLR 系统高 89.8-214.8% 和 243.4-765.6%。WDR和CLR系统在主要种植季节的粮食产量没有显着差异;然而,在 WDR 系统中它较低,因为在宿根生长期间较短的生长持续时间和较小的圆锥花序。主季作物残茬中干物质(DM)、非结构性碳水化合物(NSCs)和氮的较高积累有助于提高WDR在宿根季节的再生能力。在 WDR 系统中它较低,因为在宿根生长持续时间较短和圆锥花序较小。主季作物残茬中干物质(DM)、非结构性碳水化合物(NSCs)和氮的较高积累有助于提高WDR在宿根季节的再生能力。在 WDR 系统中它较低,因为在宿根生长持续时间较短和圆锥花序较小。主季作物残茬中干物质(DM)、非结构性碳水化合物(NSCs)和氮的较高积累有助于提高WDR在宿根季节的再生能力。
更新日期:2022-05-04
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