Judul: Evaluation of Characteristics of Physical Properties, Chemical Properties and Soil Quality of Post-Harvest Paddy Soil (Case Study: Tuban, East Java)
Abstrak: Tanah sawah pasca panen memiliki sifat yang berubah dan berbeda dengan kondisi ketika sawah diairi, meskipun merupakan kelanjutan dari sifat sebelumnya. Sifat yang berbeda perlu dievaluasi untuk mengetahui kualitas dan tingkat kesuburannya. Penelitian bertujuan mengevaluasi karakteristik sifat fisika dan kimia tanah sawah pasca panen di Tuban, Jawa Timur dan menentukan kualitas tanah serta potensinya untuk penanaman palawija. Metode penelitian menggunakan metode Principal Component Analysis (PCA) dan Minimum Data Set (MDS) dari parameter yang mewakili fungsi tanah untuk analisis kualitas tanah. Parameter yang dianalisis adalah tekstur, bobot isi, pori air tersedia, permeabilitas, C-organik, N total, P-tersedia (P2O5), Kalium dapat ditukar (K-dd), dan Kapasitas Tukar Kation (KTK). Berdasarkan hasil penelitian menunjukkan lokasi penelitian bertekstur klei yang masuk kedalam kategori sedang. Bobot isi berkisar pada 0.8 – 1.4g/cm3 . Pori air tersedia berkisar pada 7.37 – 41.47%. Permeabilitas berada pada rentang 0 – 39.88cm/jam. Kadar C-organik dan Nitrogen relatif rendah. P-tersedia, K-dd, KTK relatif tinggi. Berdasarkan analisis PCA didapatkan tiga parameter sebagai MDS yaitu tekstur, Pori Air Tersedia (PAT), dan permeabilitas. Nilai IKT berkisar 2.60 – 3.43 yang masuk kategori agak rendah dan sedang. Indeks Kualitas Tanah yang dominan pada daerah penelitian adalah sedang. Hasil analisis menunjukkan lokasi penelitian sesuai untuk pengembangan tanaman palawija dan IKT yang rendah dapat ditingkatkan dengan pemberian bahan organik., Post-harvest paddy soil has changed properties and is different from the conditions when the paddy soil is irrigated, although it is a continuation of the previous properties. Different properties need to be evaluated to determine their quality and fertility rate. The study aimed to evaluate the characteristics of physical and chemical properties of post-harvest paddy soil in Tuban, East Java and determine soil quality and its potential for planting crops. The research used Principal Component Analysis (PCA) and Minimum Data Set (MDS) method to select parameters for soil quality analysis. The parameters analyzed were texture, bulk density, available water pores, permeability, C-organic, total nitrogen, available phosphor (P2O5), exchangeable Potassium, and Cation Exchange Capacity (CEC). Based on the result showed that the location of the study has a clay texture which included in the moderate category. Bulk density ranges from 0.8 – 1.4g/cm3 . Available water pores ranges from 7.37 – 41.47%. Permeability ranges from 0 – 39.88cm/h. C-organic and total nitrogen level are relatively low. Available phosphor, exchangeable potassium, and CEC are relatively high. Based on the PCA analysis, there are three parameters obtained as the MDS that are texture, available water pores, and permeability. The Soil Quality Index values range from 2.60 – 3.43, which included in the slightly low and medium categories. The dominant soil quality index in the study area is medium categories. The results of the analysis showed that the location of the study is suitable for the development of secondary crops and SQI low category can be improved by the provision of organic matter.
Keyword: oil Quality Index, Minimum Data Set (MDS), Principal Component Analysis (PCA)