Enhanced wheat yield and flag leaf physiology in saline-alkali soils using modified straw water-retaining agent

IF 5.9 1区农林科学 Q1 AGRONOMY

Agricultural Water Management Pub Date : 2025-02-01 DOI:10.1016/j.agwat.2024.109264

Min Yang, Cexun Ji, Kui Chao, Pengfei Zhu, Xiaoqing Yuan, Zenghui Hao, Xiulin Wang, Yan Shi

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引用次数: 0

Abstract

The application of water-retaining agent is one of the hot spots in current agricultural production. In this study, crop straw was modified as one of the raw materials of water-retaining agent to make modified straw water-retaining agent. The effects of modified straw water-retaining agent on wheat photosynthetic and antioxidant characteristics, nutrient accumulation after anthesis and yield were explored. Two-year experiment was conducted, and five treatments were set up: CK (no water-retaining agent), T1 (18 kg·ha⁻¹ modified straw water-retaining agent), T2 (36 kg·ha⁻¹ modified straw water-retaining agent), T3 (54 kg·ha⁻¹ modified straw water-retaining agent), T4 (36 kg·ha⁻¹ commercial water-retaining agent). The results showed that the application of water-retaining agent could increase the chlorophyll content and improve the photosynthetic characteristics of wheat flag leaves, and the application of water-retaining agent was beneficial to increase the activities of Superoxide Dismutase (SOD), Peroxidase (POD) and Ascorbate Peroxidase (APX) and reduce the content of Malondialdehyde (MDA) in wheat flag leaves. Correlation analysis showed that there was a significant correlation between photosynthesis and antioxidant system. The accumulation of nitrogen, phosphorus and potassium in stems, leaves and spikes of T1-T4 was higher or significantly higher than that of CK. The overall yield of the two years was T2 > T4 > T3 > T1 > CK, and compared with CK, T2 and T4 increased significantly by 13.3 %-16.5 % and 9.1 %-12.9 %, respectively. The results of this study can provide theoretical and practical basis for the application of modified straw water-retaining agents in field production.

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改良秸秆保水剂提高盐碱地小麦产量和旗叶生理

保水剂的应用是当前农业生产中的热点之一。本研究以农作物秸秆为保水剂原料之一进行改性，制备改性秸秆保水剂。探讨了改性秸秆保水剂对小麦光合抗氧化特性、花后养分积累及产量的影响。试验为期2年，设5个处理：CK（无保水剂）、T1（18 kg·ha−1改性秸秆保水剂）、T2（36 kg·ha−1改性秸秆保水剂）、T3（54 kg·ha−1改性秸秆保水剂）、T4（36 kg·ha−1市售保水剂）。结果表明，施用保水剂可提高小麦旗叶叶绿素含量，改善叶片光合特性；施用保水剂有利于提高小麦旗叶超氧化物歧化酶（SOD）、过氧化物酶（POD）和抗坏血酸过氧化物酶（APX）活性，降低丙二醛（MDA）含量。相关分析表明，光合作用与抗氧化系统之间存在显著的相关关系。t1 ~ t4处理的茎、叶和穗中氮、磷、钾的积累量高于或极显著高于CK。两年的总收率T2 祝辞 T4 祝辞 T3 祝辞 T1 祝辞 CK,和与CK相比,T2和T4显著增加了13.3  % % -16.5和9.1  % % -12.9,分别。研究结果可为改性秸秆保水剂在田间生产中的应用提供理论和实践依据。

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来源期刊

Agricultural Water Management 农林科学-农艺学

CiteScore

12.10

自引率

14.90%

发文量

648

审稿时长

4.9 months

期刊介绍： Agricultural Water Management publishes papers of international significance relating to the science, economics, and policy of agricultural water management. In all cases, manuscripts must address implications and provide insight regarding agricultural water management.