How do novel plant growth regulators and cultivation models strategies affect mechanical strength, lodging resistance and maize productivity in semi-arid regions?

文献类型： 外文期刊

第一作者： Ali, Shahzad

作者： Ali, Shahzad;Ali, Shahzad;Li, Zongzhen;Zhang, Xia;Xi, Yueling;Shaik, Mohammed Rafi;Khan, Mujeeb

作者机构：

关键词： Lodging resistance; Stalk mechanical strength; Growth regulators; Canopy structure; Cultivation models; Vascular bundle; Maize production

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：6.7； 五年影响因子：6.6 ）

ISSN： 0378-3774

年卷期： 2024 年 295 卷

页码：

收录情况： SCI

摘要： Plant growth regulators are synthetic compounds that have become a significant and technical guarantee for agricultural productivity. In China, "Jindeli", which contains active elements of ethephon and cycocel (EC), has been proven to prevent maize stem elongation, improve maize stem thickness, stem morphology and mechanical strength, root growth, lodging resistance, and yield under various cultivation models. Diethyl aminoethyl hexanoate (DA -6) can promote cell division and growth. From 2020 -2021, four growth regulators sprays were used to conduct a field experiment; G 1 : water spraying; G 2 : EC spraying; G 3 : DA -6 spraying; G 4 : EC +DA-6 spraying under two cultivation models; R: ridge covered with plastic film mulching and T: traditional flat planting without plastic mulching. The results indicated that RG 4 treatment considerably decreased plant height, internode length, ear height, lodging rate, and center of gravity height, while improved the internode bending strength, crosssectional area, cortical thickness, and stem vascular bundles as compared with rest of all other treatments. RG 4 treatment considerably improved internode diameter, stem mechanical strength, filling degree, root growth, mean tilt angle, and lignin content, while significantly reducing LAI. In addition, RG 4 considerably enhanced the quality of corn stems, such as increasing mechanical properties and enhancing the compressive strength of corn stalks that content of hemicellulose, cellulose, and lignin has been increased. Furthermore, RG 4 treatment significantly improved grain yield by optimizing leaf layer structure and increasing bleeding saps levels, increasing the grains per row and ear. Thus, under the RG 4 treatment maize lodging rate was decreased 72.1%, and increased WUE (52.8%), and grain yield (46.6%). In conclusion, the results clearly demonstrate that in the semi-arid regions risk of lodging can be avoided by spraying EC +DA-6 with ridge covered plastic film mulching to the enriched stalk quality, shaping plant morphological characteristics, and proving a stable cultivation model to improving maize productivity.

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