Effect of polyhalite fertilizer on the potassium efficiency and uptake of lowland rice (Oryza sativa L.)1 planted in Oriental Mindoro, Philippines

Date

8-2022

Degree

Bachelor of Science in Agriculture

Major Course

Major in Soil Science

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Patrick M. Rocamora

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Abstract

Rice (Oryza sativa L.)' is one of the major food crops in the Philippines. This study aims to test the viability of Polyhalite fertilizer, a potassium-based fertilizer, as an improved alternative to muriate of potash (MOP) fertilizer to improve the yield of rice planted in a flooded San Manuel silt loam soil. Samples were collected during the dry season (December 2019 to February 2020) and analyzed for soil pH and exchangeable potassium. Results indicates that exchangeable K decreased in rice from 30 DAT to 60 DAT mainly because of plant nutrient absorption. However, there was no proof that polyhalite treatments produced acidifying effects because pH values were stable in treatments with polyhalite compared with MOP. Growth parameters such as plant height, tiller count and number of panicles showed significant improvement, however grain yield did not have any significant differences compared with the control. Combination of polyhalite with conventional N and P fertilizer produce the most promising effects for plant growth. It would be suggested to repeat the experiment for several seasons to compare the long-term effect of such applications in a lowland condition in Mondoro. However, treatments with higher polyhalite ratio than MOP when mixed, showed significantly improved values for soil pH meaning it can perform better with proper nutrient management for several seasons than MOP.

Language

English

LC Subject

Rice--Fertilizers, Fertilizers--Application, Agriculture, Soil Science Agricultural Systems Institute Soil Science 200

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2022 A3 O74

Document Type

Thesis

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