Improving Selected Chemical Properties of a Paddy Soil in Sabah Amended with Calcium Silicate: A Laboratory Incubation Study
Improving Selected Chemical Properties of a Paddy Soil in Sabah Amended with Calcium Silicate: A Laboratory Incubation Study
复制标题
用硅酸钙改良沙巴稻田土的选定化学性质：实验室孵化研究
DOI：
10.3390/su142013214
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发表时间：
2022
期刊：
影响因子：
3.9
通讯作者：
M. Jalloh
中科院分区：
文献类型：
--
作者：
Ivy Quirinus Chong;Elisa Azura Azman;J. Ng;Roesnita Ismail;A. Awang;Nur Aainaa Hasbullah;R. Murdad;O. Ahmed;A. A. Musah;Md. Amirul Alam;Normah Awang Besar;N. Tajidin;M. Jalloh
在马来西亚，水稻产量和生产力的主要制约因素是土壤贫瘠和管理不善，因为这些土壤的特点是低pH值、低养分有效性、低有机质以及高交换性铝和铁离子，这是由高降雨量和高温造成的。因此，进行了一项培养研究，以确定硅酸钙（HmbG品牌）的最佳用量，以改善马来西亚沙巴水稻土的土壤pH值、电导率（EC）、交换性铝、有效磷和阳离子交换容量（CEC）。采用完全随机设计（CRD），以0 （T1）、1 （T2）、2 （T3）和3 tha−1 （T4）的施用量为3次，分别在Kelawat系列（Typic Dystrudept）土壤中孵育30、60、90和120天。硅酸钙通过释放SiO44−和Ca2+离子来中和和固定H+离子，显著改善了土壤pH。此外，改良剂的中和作用使铝水解受阻57.4%，使土壤有效磷增加31.26% ~ 50.64%。土壤中磷的有效性增加也是由于SiO44−对土壤矿物质中磷的高亲和力，并且认为SiO44−可以暂时吸附交换性碱阳离子，如K+， Ca2+， Mg2+和Na+。此外，与未处理土壤（T1）相比，施用3 tha - 1硅酸钙可使土壤CEC提高54.84%，这是由于pH值增加和负电荷位点数量增加。硅酸钙最适宜的施用量为3 t ha−1 （T4）。这些结果表明，硅酸钙可以提高水稻种植的土壤生产力和农艺效率。需要进行温室和田间试验，以确定本孵化研究中推荐的处理对土壤生产力、水稻生长和产量的影响。
In Malaysia, the main constraints of rice yield and productivity are infertile soils and poor management practices because these soils are characterized by low pH, low nutrient availability, low organic matter, and high exchangeable Al and Fe ions, due to high rainfall and hot temperatures. Thus, an incubation study was conducted to determine the optimum amount of calcium silicate (HmbG brand) to improve the soil pH, electrical conductivity (EC), exchangeable Al, available P, and cation exchange capacity (CEC) of a paddy soil in Sabah, Malaysia. The Kelawat series (Typic Dystrudept) soil was incubated with calcium silicate at the application rates of 0 (T1), 1 (T2), 2 (T3), and 3 t ha−1 (T4) using a Completely Randomized Design (CRD) in triplicates for 30, 60, 90, and 120 days. The calcium silicate used significantly improved soil pH because of the release of SiO44− and Ca2+ ions, which neutralized and immobilized H+ ions. Furthermore, the neutralizing effects of the amendment impeded Al hydrolysis by up to 57.4% and this resulted in an increase in the available P in the soil by 31.26% to 50.64%. The increased availability of P in the soil was also due to the high affinity of SiO44− to desorb P from soil minerals and it is believed that SiO44− can temporarily adsorb exchangeable base cations such as K+, Ca2+, Mg2+, and Na+. Moreover, applying calcium silicate at 3 t ha−1 improved soil CEC by up to 54.84% compared to that of untreated soils (T1) because of increased pH and the number of negatively charged sites. The most suitable application rate of the calcium silicate was found to be 3 t ha−1 (T4). These findings suggest that calcium silicate can improve soil productivity and agronomic efficiency in rice farming. Greenhouse and field trials are necessary to ascertain the effects of the recommended treatments of this incubation study on soil productivity, rice growth, and yield.