Abstract
Increased rice needs in an extensive use of paddy fields in the Jatipurno, Wonogiri. Managing rice fields can reduce soil quality. Proper management can improve soil quality, Jatipurno has management such as organic, semi-organic and inorganic paddy field management which have a real effect on soil quality. Assessment of soil quality is measured by physical, chemical and biological indicators, where each factor has a different effect. The chemical indicators are often used as the main indicators for determining soil quality, whereas every parameter has the opportunity to be the main indicator. So, biological indicators can play indicators. The main indicators are obtained from the correlation test (p-values ≤ 0,05 - < 0,01) and Principal Component Analysis with high value, eigenvalues > 1 have the potential to be used as Minimum Data Sets. The result is biological can be able to use as the Minimum Data Set such as microbial carbon biomass, respiration, and total bacterial colonies. The Soil Quality Index (SQI) of various paddy management practices shows very low to low soil quality values. The management of organic rice systems shows better Soil Quality Index with a score of 0,20 compared to other management. The practice of organic rice management shows that it can improve soil quality.
Highlights
Increasing food needs give rise to the wide paddy fields to meet food consumption (Liu et al, 2014)
Soil analyze methods include physics, chemical and a biological indicator conducted in the laboratory by the method such as soil texture by the piping method, bulk density was determined by the pycnometer method
According to research Wahyuni et al (2016) that giving manure 20kg/ha increases the bacterial population to 105cfu/ml and according to Surekha (2013) that microbial respiration has a higher treatment with organic giving
Summary
Increasing food needs give rise to the wide paddy fields to meet food consumption (Liu et al, 2014). Paddy field intensive management results in changes in soil quality that are low. Based on data from the Research and Development Agency of the Ministry of Agriculture, 3,250 million ha of rice containing organic matter is less than 2% (Sitepu, Anas, and Djuniwati, 2017). This fact proves that rice fields have low fertility and soil quality. Improper management of paddy fields use of inorganic fertilizers results in environmental pollution making (Zhao et al, 2016 ; Oladele., 2017) the Soil Quality Index low
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