Comprehensive study on physico-chemical soil analysis for optimizing paddy (Oryza sativa L.) cultivation in Kamrup (Metro) district of Assam, India

Linton Hazarika, Nihar Ranjan Bora, Kharsing Ramdey, Prachurjya Baruah, Suntoo Das, Bijumoni Borah, Kishor Kr. Shah
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Abstract

Rice being the staple food in Assam, its productivity should be increased for the availability of the common people. The main objective of this study is to compare the qualities of soil samples and to correlate the results with the production (per year) of paddy (Oryza sativa) from 3 different studied areas. The soil samples were collected during March-May, 2023. The oven dry method and drying and weighing method are used to determine bulk and particle densities respectively. The electrical conductivity and pH of the soil samples are determined using a benchtop conductivity meter and pH meter. Walkley-Black chromic acid wet oxidation method and methylene blue method are used to determine the organic carbon and cation exchange capacity (CEC) of soil samples respectively. Nitrogen, phosphorus, and potassium of the soil samples are estimated using the instrument Mridaparikshak. The moisture content, bulk density, particle density, soil porosity, cation exchange capacity (CEC), pH, electrical conductivity, nitrogen, P2O5, and K2O are observed in the range of 24.69 % to 39.42 %, 1.12 g cm-3 to 1.25 gcm-3, 1.83 gcm-3 to 1.99 g/cm-3, 33 to 43, 2.8 × 10-5mol dm-3to 11.7x10-5 mol dm-3, 7.4 to 8, 0.23 dS/m to 0.40 dS/m, 0.645% to 1.49%, 213.20 kg/ha - 235.14 kg/ha, 17.92 kg/ha - 20.44 kg/ha and 148.92 kg/ha -164.45 kg/ha respectively. The soil characterized by moisture content =27.52 %, bulk density=1.25 gcm-3, particle density =1.86 g cm-3, porosity =33%, cation exchange capacity =11.7 x 10-5 mol dm-3, pH {(1:5) at 210C} = 7.9, electrical conductivity = 0.40 dS/m, organic carbon =0.825 %, organic matter =1.42 %, N =235.14 kg/ha, P2O5 = 20.44 kg/ha and K2O =164.45 kg/ha showed good yield.
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为优化印度阿萨姆邦卡姆鲁普(Metro)地区水稻(Oryza sativa L. )种植而进行的土壤理化分析综合研究
水稻是阿萨姆邦的主食,应提高其产量以满足普通民众的需求。本研究的主要目的是比较土壤样本的质量,并将结果与 3 个不同研究地区的水稻(Oryza sativa)产量(每年)相关联。土壤样本于 2023 年 3 月至 5 月期间采集。分别采用烘箱干燥法和干燥称重法测定体积密度和颗粒密度。使用台式电导率仪和 pH 计测定了土壤样本的电导率和 pH 值。Walkley-Black 铬酸湿氧化法和亚甲蓝法分别用于测定土壤样本的有机碳和阳离子交换容量(CEC)。土壤样本中的氮、磷、钾是用 Mridaparikshak 仪器估算的。在含水量、容重、颗粒密度、土壤孔隙度、阳离子交换容量(CEC)、pH 值、电导率、氮、P2O5 和 K2O 的观测范围分别为 24.69 % 至 39.42 %、1.12 g cm-3 至 1.25 gcm-3、1.分别为 33 至 43、2.8 × 10-5mol dm-3 至 11.7x10-5 mol dm-3、7.4 至 8、0.23 dS/m 至 0.40 dS/m、0.645% 至 1.49%、213.20 千克/公顷 - 235.14 千克/公顷、17.92 千克/公顷 - 20.44 千克/公顷和 148.92 千克/公顷 - 164.45 千克/公顷。土壤特性为:含水量 =27.52%,容重 =1.25 gcm-3,颗粒密度 =1.86 g cm-3,孔隙率 =33%,阳离子交换容量 =11.7 x 10-5 mol dm-3,pH 值 {(1:5) at 210C} = 7.9, 电导率 = 0.40 dS/m, 有机碳 =0.825 %, 有机质 =1.42 %, N =235.14 kg/ha, P2O5 = 20.44 kg/ha 和 K2O =164.45 kg/ha。
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