Effect of Combination of Soil Improvers and N, P, K Fertilizer on Organic C, Total N, Uptake N, and Yield of Lowland Rice (Oryza sativa L.) in Inceptisols from Jatinangor, West Java, Indonesia

Emma Trinurani Sofyan *

Department of Soil Science and Land Resources, Faculty of Agriculture, Universitas Padjadjaran, Indonesia.

Benny Joy

Department of Soil Science and Land Resources, Faculty of Agriculture, Universitas Padjadjaran, Indonesia.

Fatharani Raidasari

Agrotechnology Study Program, Faculty of Agriculture, Universitas Padjadjaran, Indonesia.

*Author to whom correspondence should be addressed.


Abstract

Intensive inorganic fertilization in conventional agriculture can cause a decrease in soil quality. Modification through balanced fertilization with soil amendments is expected to improve soil quality and increase plant productivity. The experiment aimed to evaluate the effect of a combination of soil improver and N, P, K fertilizer on lowland rice (Oryza sativa L.) with a focus on increasing organic C, total N, and uptake N, as well as finding the dose that provides the best lowland rice yields in Inceptisols from Jatinangor, West Java, Indonesia. Field experiments using plastic buckets as experimental units for 5 months were carried out and arranged based on a Completely Randomized Block Design (CRBD) with eight treatment groups, including Control (A), recommended N, P, K dose (B), soil improvers (C), ½ soil improvers and ¾ recommended NPK dose (D), ¾ soil improvers and ¾ recommended N, P, K dose (E), soil improvers and ¾ recommended N, P, K dose (F), 1½ soil improvers and ¾ recommended N, P, K dose (G), as well as soil improvers and recommended N, P, K dose (H).  The results showed was that there is an influence of the combination of soil improvers and N, P, and K fertilizer in increasing organic C, total N, uptake N, and rice yield. This experiment concluded that the dose of 1 soil improvers (8 Mg ha-1) and ¾ recommended N, P, K dose (262.5 kg ha-1 Urea, 37.5 kg ha-1 SP-36, and 37.5 kg ha-1 KCl) was the best treatment in increasing rice yields and it is necessary to carry out experiments on rice yields with a higher level of heterogeneity.

Keywords: Humic acid, organic material, straw biochar, water hyacinth compost, nitrogen


How to Cite

Sofyan, Emma Trinurani, Benny Joy, and Fatharani Raidasari. 2024. “Effect of Combination of Soil Improvers and N, P, K Fertilizer on Organic C, Total N, Uptake N, and Yield of Lowland Rice (Oryza Sativa L.) in Inceptisols from Jatinangor, West Java, Indonesia”. International Journal of Plant & Soil Science 36 (3):142-49. https://doi.org/10.9734/ijpss/2024/v36i34409.