Carbon assimilation of three groundnut genotypes subjected to the application of macronutrient nanoparticles
摘要
There has been a significant increase in drought problems affecting grain production around the world in recent years, which has also affected the improvement of agricultural water use efficiency. Crop production in water-scarce and nutrient-depleted areas requires efficient approaches to effectively manage water and nutrients. To achieve efficient and effective water use, it is necessary to improve crop water use efficiency and drought tolerance through physiological regulation. During the limited water supply in plants, plant nutrients are crucial to enhancing water use efficiency. The second most abundant minerals in plants are magnesium and calcium and they are essential for a variety of physiological and biochemical processes, including photosynthesis and enzyme activation. This study evaluated the effects of magnesium oxide and calcium carbonate nanoparticles on water use efficiency and carbon accumulation in three groundnut genotypes. The treatment of nanoparticles on the foliar spray of groundnut genotypes was carried out using a 3 × 7 factorial completely randomized design with three replicates of three groundnut genotypes IS-07947 ICGV31096 and ICGV131065. Treatments consisted of MgO at 50, 100, and 200 ppm, as well as with CaCO3 at 50, 100, and 200 ppm on NP treatments, including negative control (untreated plants). Measurements of the 13C/12C isotope ratios were measured at the 50% flowering growth stage in order to determine water use efficiency and carbon accumulation of three groundnut genotypes. The collected data were subjected to two-way analysis of variance and mean separations by Tukey HSD at P < 0.05. The study revealed that the addition of magnesium oxide nanoparticles at 50 ppm and 100 ppm calcium carbonate had a positive effect on carbon accumulation and could effectively improve the water use efficiency of groundnut plants.