Identification of agronomic and physiological traits in high rolling-resistance varieties for mechanized ratoon rice production

IF 6.4 1区农林科学 Q1 AGRONOMY

Field Crops Research Pub Date : 2025-08-12 DOI:10.1016/j.fcr.2025.110098

Xing Yu , Yuan Guo , Haitao Zhang , Hongshun Xiang , Guodong Yang , Chang Zheng , Zhenmei Wang , Dongliang Xiong , Jianliang Huang , Shaobing Peng

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引用次数: 0

Abstract

Context

Reducing yield loss of ratoon crop from rolling damage on stubble during mechanical harvesting of main crop is essential for the widespread adoption of mechanized ratoon rice.

Research question

There is tremendous variation in rolling resistance among rice varieties, yet limited information is available on the agronomic and physiological traits underlying high rolling-resistant varieties for mechanized ratoon rice production.

Methods

Field experiments were conducted in 2022 and 2023 to determine the rolling resistance of 12 widely cultivated varieties and their stubble agronomic and physiological traits in the main crop. The rolling resistance was evaluated by the grain yield of the ratoon crop after rolling the entire plot during the harvesting of the main crop.

Results

Results indicated that four high rolling-resistant varieties produced a ratoon crop yield of 5.41 t ha⁻¹ under crushing damage, 35.8 % higher than the other varieties, primarily attributed to increased spikelets per panicle, grain weight, and dry matter accumulation. Significant differences were observed among varieties in stubble agronomic and physiological traits in the main crop. Specifically, high rolling-resistant varieties had higher stubble non-structural carbohydrate (NSC) concentration at maturity, as well as greater internode diameter, culm wall thickness, and breaking resistance of the 4th internode from top during the grain-filling period of the main crop compared to the other varieties.

Conclusions

Our results suggest that the key traits associated with high rolling resistance include stubble NSC concentration and culm physical strength at the reproductive stage of the main crop.

Implications

Therefore, varietal selection and optimizing crop management practices to improve stubble agronomic and physiological traits of the main crop are critical for reducing the yield loss of the ratoon crop in mechanized ratoon rice production.

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水稻机械化高产抗碾压品种农艺生理性状鉴定

背景减少主粮机械化收获时茬卷轧造成的产量损失是水稻机械化推广应用的关键。水稻品种间的抗摇性差异很大，但对抗摇性高的水稻品种的农艺和生理性状的研究资料有限。方法于2022年和2023年进行大田试验，测定12个广泛栽培品种的抗滚轧性及其主粮茬农艺生理性状。在主粮收获期间，以整块地滚动后的再生作物籽粒产量评价其抗滚压能力。结果4个高抗碾压品种在碾压损害下的再生产量为5.41 t ha - 1，比其他品种高出35.8 %，这主要是由于每穗粒数、粒重和干物质积累增加所致。品种间主要作物茬农艺和生理性状差异显著。其中，高抗碾压品种成熟期的残茬非结构碳水化合物（NSC）浓度较高，灌浆期的节间直径、茎秆壁厚、节间从上至下第4个节间的抗折性均高于其他品种。结论主要作物生殖期茎秆NSC浓度和茎秆体力是影响其抗卷轧能力的关键性状。因此，在旱稻机械化生产中，通过品种选择和优化作物管理措施来改善主要作物的残茬农艺和生理性状是减少旱稻产量损失的关键。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Field Crops Research 农林科学-农艺学

CiteScore

9.60

自引率

12.10%

发文量

307

审稿时长

46 days

期刊介绍： Field Crops Research is an international journal publishing scientific articles on: √ experimental and modelling research at field, farm and landscape levels on temperate and tropical crops and cropping systems, with a focus on crop ecology and physiology, agronomy, and plant genetics and breeding.