Land and Water Management Research Group, KSCSTE- Centre for Water Resources Development and Management (CWRDM), Kozhikode, Kerala, 673571, India.
University of Calicut, Calicut University PO, Tenhipalam, Kerala, 673635, India.
Sci Rep. 2024 Aug 20;14(1):19335. doi: 10.1038/s41598-024-68244-7.
Rice is a staple food in the diets of more than half of the world's population. With India's irregular rainfall patterns and continual environmental anomalies, particularly in Kerala, the identification of climate-smart management practices which can withstand drought is critical. In this context, atrial was conducted in the experimental plots to evolve effective water and nutrient management practices under aerobic rice in lateritic soils of Kerala. However, during the experiment in a few treatments, rolling of leaves was observed, and when explored for the reasons, it was due to soil moisture deficit and plant water stress. When compared to other crop species, rice is highly vulnerable to water deficit. In this regard, an attempt has been made to study the leaf rolling pattern in aerobic rice and how this can be managed with a few soil amendments so that rice productivity can be sustained. The results showed that plant growth parameters, relative water content (RWC), membrane leakage (ML) and spectral signatures were significantly affected by the leaf rolling. It was found that leaf rolling affected plants have less RWC and higher ML and are under drought stress. Pearson correlation analysis showed a strong positive correlation (P < 0.05) of key spectral indices with other physiological traits such as RWC and negatively correlated with ML. Moisture absorbent media such as cocopeat, compost, saw dust and vermiculite were attempted as management strategies to overcome this stress. Results showed that among the absorbents attmepted, cocopeat was found to be better in managing the stress. These results suggest that for aerobic rice under lateritic soil, moisture absorbent media such as cocopeat, has to be incorporated so that it can reduce the rate of leaf rolling thereby sustaining the paddy yield.
水稻是全球一半以上人口饮食中的主食。由于印度降雨模式不规则且环境异常持续，尤其是在喀拉拉邦，确定能够抵御干旱的智能气候管理实践至关重要。在这种情况下，在喀拉拉邦的红壤中进行了一项试验，以在有氧稻中发展有效的水和养分管理实践。然而，在实验的一些处理中，观察到叶片滚动，当探究原因时，这是由于土壤水分不足和植物水分胁迫。与其他作物相比，水稻对水分亏缺极为敏感。在这方面，尝试研究了有氧稻中的叶片卷曲模式，以及如何通过一些土壤改良来管理这种模式，以维持水稻的生产力。结果表明，叶片卷曲显著影响了植物生长参数、相对水分含量（RWC）、膜渗漏（ML）和光谱特征。发现叶片卷曲影响的植物具有较低的 RWC 和较高的 ML，并且处于干旱胁迫下。Pearson 相关分析显示，关键光谱指数与其他生理特征（如 RWC）之间存在很强的正相关（P<0.05），与 ML 呈负相关。尝试了椰糠、堆肥、锯末和蛭石等吸湿介质作为管理策略来克服这种胁迫。结果表明，在所尝试的吸收剂中，发现椰糠在管理这种胁迫方面更好。这些结果表明，对于红壤中的有氧稻，必须掺入吸湿介质，如椰糠，以减少叶片卷曲的速度，从而维持水稻产量。
