Minninga Geethika Neranjani Rupasinghe, M. Hanafi, M. Yusop, Roesnita Ismail, P. Azizi, Liyana Rallage Mahesh Chaminda Liyanage, Amoda Piyangi Mayakaduwa
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The highest Si tissue concentration of 395.27 μg/100 mg was recorded in 100 kg SiO2/ha treated plants, and their potassium, phosphorous, silicon, and magnesium uptakes were increased by 2, 1.3, 11 and 1.8 folds, respectively. Further, in yield attributes, 32 and 52% increments and a 30% decrease were observed in the total number of grains, filled grains, and unfilled grains per panicle, respectively, and were not significantly different from those observed in 125 kg SiO2/ha rate. The highest grain yield of 104.6 g/pot was obtained with 100 kg SiO2/ha level of Si fertilizer, and it was statistically at par with the yields obtained with 125 kg SiO2/ha. 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引用次数: 0
摘要
水稻植株积累的硅含量更高,这在水稻基因型之间有所不同。本研究旨在确定最佳施肥量及其对生长、产量、产量属性和土壤养分吸收的影响。最初施用六种不同的二氧化硅(SiO2)速率,包括0、50、75、100、125和150 kg SiO2/ha。通过统计分析,利用方差分析(ANOVA)和Duncan’s Multiple Range Test(DMRT)分离平均值,获得SiO2的最佳比率。结果表明,施硅对地上部干重和株高有显著影响。在100kg SiO2/ha处理的植物中,硅组织的最高浓度为395.27μg/100mg,其钾、磷、硅和镁的吸收量分别增加了2、1.3、11和1.8倍。此外,在产量属性方面,每穗总粒数、灌浆粒数和未灌浆粒数分别增加了32%和52%,减少了30%,与125kg SiO2/ha的产量没有显著差异。硅肥施用100公斤二氧化硅/公顷可获得104.6克/盆的最高粮食产量,在统计上与125公斤SiO2/公顷的产量持平。二次函数计算出最适粮食产量(100.5g/盆)的硅肥用量为115 kg SiO2/ha;因此,可以得出这样的结论:籼稻基因型需要施用115公斤/公顷的SiO2以获得更高的生长和养分吸收的最佳产量。
Optimizing Silicon Application to Improve Growth, Grain Yield, and Nutrient Uptake of indica Rice (Oryza sativa cv. Bw 367)
The rice plant accumulates silicon (Si) in greater quantity, which varies among the rice genotypes. This study was conducted to determine the optimum fertilization rate and its effect on growth, yield, yield attributes, and soil nutrient uptake. Six different silicon dioxide (SiO2) rates, including 0, 50, 75, 100, 125, and 150 kg SiO2/ha, were applied initially. The optimum rate of SiO2 was obtained by statistical analysis, utilizing the analysis of variance (ANOVA) and Duncan’s Multiple Range Test (DMRT) to separate the means. The results showed that shoot dry weight and plant height were significantly affected by Si fertilization. The highest Si tissue concentration of 395.27 μg/100 mg was recorded in 100 kg SiO2/ha treated plants, and their potassium, phosphorous, silicon, and magnesium uptakes were increased by 2, 1.3, 11 and 1.8 folds, respectively. Further, in yield attributes, 32 and 52% increments and a 30% decrease were observed in the total number of grains, filled grains, and unfilled grains per panicle, respectively, and were not significantly different from those observed in 125 kg SiO2/ha rate. The highest grain yield of 104.6 g/pot was obtained with 100 kg SiO2/ha level of Si fertilizer, and it was statistically at par with the yields obtained with 125 kg SiO2/ha. The quadratic function found the rate of Si fertilizer for optimum grain yield (100.5 g/pot) as 115 kg SiO2/ha; thus, it could be concluded that indica rice genotypes need to be fertilized with 115 kg SiO2/ha for optimum yield for higher growth and nutrient uptake.