Effects of Various Liming Materials on the Growth of Rice under Rainshelter Condition

AgroTech Food Science, Technology and Environment Pub Date : 2022-12-01 DOI:10.53797/agrotech.v1i2.1.2022

E. A. Azman, Roesnita Ismail, S. Jusop

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Abstract

A study was conducted to evaluate the effects of liming materials on the growth of rice under rainshelter conditions and MR 219 rice variety was used in this experiment. The treatments were: 1) T1, no application of lime, 2) T2, 4 t ha-1 of ground magnesium limestone (GML), 3) T3, 2 t ha-1 of hydrated lime, 4) T4, 20 L ha-1 of liquid lime. It was found that the application of 4 t ha-1 of GML had produced the highest rice yield of 8.2 t ha-1. The result showed that as panicle length increase, spikelet per panicle also increases. Relative rice yield is negatively correlated with the soil pH, and this indicates that as soil acidity increase (observed with pH between 2 to 3), the rice yield decrease and vice versa. At harvest, the soil pH exceeded 6 for all the treatment. It was also observed that as soil exchangeable Ca increase, soil pH also increases. Among the treatment, soil treated with 2 t ha-1 of hydrated lime gave the highest exchangeable Ca in the soil of 11.86 cmolc kg-1 soil with Ca concentration of 0.12% in the root. It was observed that liming increases soil pH and exchangeable cations in the soil. Therefore, liming is essential to ameliorate the acid sulfate soils for rice cultivation.

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不同石灰材料对雨棚条件下水稻生长的影响

以mr219水稻品种为研究对象，研究了施用石灰材料对遮雨条件下水稻生长的影响。处理为:1)T1，不施用石灰，2)T2，磨碎镁灰岩(GML) 4 t ha-1, 3) T3，水合石灰2 t ha-1, 4) T4，液石灰20 L ha-1。结果表明，施用4 t hm -1的水稻产量最高，达8.2 t hm -1。结果表明，随着穗长增加，每穗颖花数也增加。水稻相对产量与土壤pH呈负相关，表明随着土壤酸度的增加(pH值在2 ~ 3之间)，水稻产量下降，反之亦然。收获时，所有处理的土壤pH值均超过6。随着土壤交换性钙的增加，土壤pH值也随之增加。其中，2 t hm -1水合石灰处理土壤的交换性钙最高，为11.86 cmolc kg-1，根部钙浓度为0.12%。石灰处理使土壤pH值和交换性阳离子增加。因此，施用石灰是改良硫酸酸性土壤的必要措施。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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AgroTech Food Science, Technology and Environment

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