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description Journal article public Agrimeta

Pengelolaan Tanah Ultisol Dengan Pemberian Pembenah Organik Biochar Menuju Pertanian Berkelanjutan

I. Putu Sujana
Published 2015

Abstract

Ultisol has a very broad distribution, covering nearly 25% of the total land area of Indonesia. Cross section of deep soil and cation exchange capacity are classified as moderate to high to make this land has an important role in the development of dryland farming in Indonesia. Almost all types of plants can be grown and developed on this land, unless constrained by climate and relief. Natural fertility Ultisol generally present in a thin horizon with a low organic matter content. Macro nutrients such as phosphorus and potassium are often deficient, acid soil reaction to very sour, and high aluminum saturation is an Ultisol soil properties which often inhibits plant growth. In addition there argillic horizon that affect the physical properties of the soil, such as micro and macro pore reduction and increased runoff, which in turn can lead to soil erosion. To speed up the recovery of the physical, chemical, biological and land rehabilitation efforts should be made by using organic matters that are difficult to decompose so that it can survive in the soil as biochar (charcoal biological). The addition of biochar as a soil conditioner derived from the combustion of waste agricultural products with limited oxygen, it has a good potential as a soil amendment, because organic C still remain in the black carbon (biochar). The addition of biochar to soil ultisol will provide considerable benefits, among others, can improve the physical, chemical and biological soil, thus indirectly able to increase crop production on land ultisol well as the development of sustainable agriculture can be realized.

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