Greener Journal of Agricultural Sciences

Greener Journal of  Agricultural Sciences Vol. 2 (8), pp.351-361, December 2012

 ISSN: 2276-7770 

Research Paper

Manuscript Number:102412134

 

Potency of Na-Humate from Subbituminous and how to do Incubation with Fosfor-Fertilizer to Increase Upland Rice Production at Acidic Mineral Soil

 

Herviyanti, Teguh. B. P., Mimien H., Amrizal S. and Ismon L.

 

1Department of Soil Science, Faculty of Agriculture, University Andalas Limau Manis, Padang, West Sumatera, Indonesian, 25163.
2Balai Pengkajian Teknologi Pertanian (BPTP) West Sumatera Province.

*Corresponding Author’s Email: herviyanti64 @ yahoo.com, Phone Number: (+751) 7050816 +8126639915

Abstract:

This research was purposed to study the ability of Na-humate from subbituminous combined with P-fertilizer and the way of incubation to control metals Al, soil fertility improvement and productivity of acidic minerals soil (Ultisol), so that the use of fertilizer could be saved and the optimal production of upland rice can be achieved. The experiment was designed using a 3 x 4 factorial with 3 replications in randomly groups design. The 1st factor was 3 ways of incubating Na-humate with P-fertilizer which are : I1 = Incubation of Na-humate 1 week, then incubation P-fertilizer 1 week; I2 = Incubation of Na-humate and P fertilizer directly into the soil for 2 weeks; and I3 = Na-humate and P fertilizer mixed for 1 week, then incubation to the soil for 1 week. The 2nd factor was Na-humate and P-fertilizer combination which are 4 doses H1 = 400 ppm (0.8 Mg/ha) + 100% R; H2 = 400 ppm + 75% R; H3 = 800 ppm (1.6 Mg/ha) + 100% R,; and H4 = 800 ppm + 75% R. The results showed that the best treatment interaction was founded to be 800 ppm Na-humate and 100% R P-fertilizer doses in I3 way incubation that is equal to 5.58 Mg/ha rice yield. However, this result is almost the same as 800 ppm Na-humate + 75% R P-fertilizer doses followed in I3 way incubation too. It was concluded that addition of Na-humate could save P-fertilizer up to 25%.
 
Keywords: Na-Humate, Subbituminous, P-Fertilizer, Upland Rice, Acidic mineral soil.

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