Peranan pengelolaan air dalam usaha mereklamasi tanah sulfat masam potential (Sulfic hydraquent) di unit Tatas, Kalimantan Tengah.
1992
Vadari T. | Suwardjo H. | Kasdi S. | Sutono A. | Abas I. | Kselik R.A.L.
英语. The water management research was carried out during two seasons in a palawija field and in a tidal rice field (sawah). Water resources were tidal water, swamp water and rainfall water. The palawija field was drained until a water level of 40 cm below soil surface. The experiments in the sawah field consisted of soil tillage, lime, fertilizer and organic matter treatments. Lime dosage was 1500 kg lime/ha, phosphate dosages was 90 kg P2O5/ha, a combination of the lime and phosphate dosages, organic matter dosage was 2 ton straw/ha and a control. The different water resources did not yet indicate significantly different total actual acidity and yield of IR 42. The combination of lime and phosphate increased soil pH from 3.8 to 4.4. Puddling increased soil pH from 3.8 to 4.2. Lime treatment yielded 2.22 ton/ha for the high yielding variety and the combination of lime and phosphate yielded 2.39 ton/ha. The water management treatments indicated significantly different yield for the local varieties: 1.93, 2.33 and 2.59 ton/ha respectively. The soil pH were 4.3, 4.1 and 4.4 for rainfal water, swamp water and tidal water respectively. Tidal water in combination with lime and phosphate gave positive effects on the reclamation of the soils and on the yields of high yielding variety in tidal rice field. Drainage treatments in combination with lime and phosphate decreases significantly the value of total actual acidity from 41 cmol/kg soil to 26 cmol/kg soil and the yield were 2.0 ton/ha and 1.93 ton/ha for upland rice and peanut respectively.
显示更多 [+] 显示较少 [-]BAHASA: Penelitian pengelolaan air telah dilaksanakan dalam dua kali musim tanam di sawah dan di ladang. Sumber air di sawah berasal dari air pasang, air rawa pasang surut dan air hujan. Lahan diatuskan sampai sedalam 40 cm sebagai ladang. Perlakuan pengolahan tanah, pengapuran, pemupukan dan pemberian bahan organik diterapkan di sawah. Dosis kapur 1500 kg kapur/ha, pupuk P 90 kg P2O5/ha, kombinasi perlakuan kapur dan pupuk P, bahan organik berupa jerami sebanyak 2 ton/ha dan kontrol. Pemberian air pasang, air rawa dan air hujan belum menunjukkan pengaruh nyata terhadap perubahan total kemasaman aktual tanah dan hasil padi IR-42. Pemberian kapur dan pupuk P menaikkan pH tanah dari 3,8 menjadi 4,4.
显示更多 [+] 显示较少 [-]