Duckweed (Lemna minor L.) growth in paddy fields improved the appearance quality of rice but greatly deteriorated its taste

IF 6.4 1区 农林科学 Q1 AGRONOMY
Liquan Jing , Yu Su , Yihan Zhao , Yang Cai , Mingyue Sun , Fucheng Zhao , Jianye Huang , Lianxin Yang , Yunxia Wang
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Abstract

Context or problem

The prevalence of duckweed (Lemna minor L.) growth in paddy fields (DGP) has escalated in recent years, potentially due to climate warming and the eutrophication of irrigation water. However, limited attention has been paid to its significant impact on rice production, particularly with regard to rice quality.

Objective or research question

A field experiment at two locations was conducted to evaluate the influence of DGP on grain quality and elucidate its possible reasons.

Methods

Three rice cultivars (JFY2, NJ5055, and YY1540) were cultivated in both control and DGP plots throughout the entire rice growing seasons. The grain quality traits, as well as the pasting and thermal properties of rice flour, were assessed alongside ecological factors related to paddy water.

Results

DGP notably enhanced the appearance quality of rice grains by reducing the chalky grain rate, chalkiness degree, and chalkiness area by 25.1 %, 34.4 %, and 13.1 %, respectively. Conversely, DGP reduced the breakdown, gel consistency, and ΔHgel of rice by 10.0 %, 10.2 %, and 14.1 %, respectively, leading to an 8.0 % decrease in the taste quality of cooked rice. DGP had no significant effect on the processing and nutritional quality of rice grain, including protein and amylose contents, phytic acid, and the bioavailability of mineral elements, but increased the milled rice yield (7.8 %). DGP-induced reductions in daytime temperature (-0.94 ℃), diurnal temperature difference (-0.88 ℃), and pH (-0.4) of paddy water could enhance the appearance quality of rice. The significant deterioration in rice palatability may be primarily attributed to the latter two factors rather than the changes in protein and amylose contents.

Conclusions

DGP significantly altered the ecological factors of paddy water, thereby improving the appearance quality of rice but greatly deteriorating its taste.

Implications or significance

The findings support sustainable rice production through rice-duckweed collaboration, providing a basis for better understanding the response of paddy field ecosystems to future climate change.
浮萍(Lemna minor L.)在稻田中生长,提高了水稻的外观品质,但使其口感严重恶化
背景或问题近年来,浮萍(Lemna minor L.)在水田(DGP)中的生长已经升级,可能是由于气候变暖和灌溉用水的富营养化。但是,人们很少注意到它对稻米生产的重大影响,特别是对稻米质量的影响。目的或研究问题通过两个地点的田间试验,评价DGP对粮食品质的影响,并阐明其可能的原因。方法选择JFY2、NJ5055和YY1540 3个水稻品种,在对照和DGP样地进行全生育期栽培。以稻谷水分相关生态因子为指标,对稻谷品质性状、米粉糊化性能和热性能进行了评价。结果dgp可显著降低稻米垩白率、垩白度和垩白面积,分别降低25.1% %、34.4% %和13. %,显著提高稻米外观品质。相反,DGP使大米的分解率、凝胶稠度和ΔHgel分别降低了10.0 %、10.2 %和14.1 %,导致煮熟大米的口感质量降低了8.0 %。DGP对稻米的蛋白质和直链淀粉含量、植酸和矿质元素的生物利用度等加工品质和营养品质无显著影响,但提高了精米产量(7.8 %)。dgp诱导水稻水白天温度(-0.94℃)、昼夜温差(-0.88℃)和pH(-0.4)的降低可以提高水稻的外观品质。大米适口性的显著恶化可能主要是由于后两个因素,而不是蛋白质和直链淀粉含量的变化。结论sdgp显著改变了水稻水的生态因子,改善了水稻的外观品质,但使其口感严重恶化。研究结果支持水稻与浮萍合作的可持续水稻生产,为更好地理解稻田生态系统对未来气候变化的响应提供了基础。
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来源期刊
Field Crops Research
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.
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