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All Journal Journal of Tropical Soils Planta Tropika Jurnal Ilmu-Ilmu Pertanian
Sajarwan, Akhmat
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Agriculture, Biological Sciences & Forestry Environmental Science

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Fertilizers for Improving the Growth Characteristics and N Uptake of Wild Rorippa indica L. Hiern in Different Soil Chotimah, Hastin Ernawati Nur Chusnul; Sajarwan, Akhmat; Tinting, Ruben; Mau, Antonius; Ichriani, Gusti Irya
PLANTA TROPIKA Vol 10, No 2 (2022)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v10i2.12833

Abstract

Rorippa indica L. Hiern is a local vegetable that is widely consumed by Dayak’s tribe in Central Kalimantan, Indonesia. It is mostly traditionally cultivated without fertilizers, resulting in low productivity. The research aimed to investigate the effect of fertilizers and soil type on the growth characteristics and N uptake of R. indica. The experiment was arranged in a factorial completely randomized design consisting of two factors with four replications. The first factor was fertilizer application (control, 20 t ha-1 of chicken manure, and 600 kg ha-1 of NPK), and the second was soil type (peat and Ultisol). The results revealed that the interaction of fertilizers and soil type gave a non-significant effect on all variables observed, except N uptake. The application of NPK increased the plant height and number of leaves significantly. Compared to control, the increment was 112.50% and 130.32%, respectively, and chicken manure application increased the dry weight (327.87%), N total (310.16%), and N uptake of plants by 478% in peat soil and 228% in Ultisol. This finding concludes that 20 t ha-1 of chicken manure can be applied to increase the productivity of R. indica.
Fertilizers for Improving the Growth Characteristics and N Uptake of Wild Rorippa indica L. Hiern in Different Soil Chotimah, Hastin Ernawati Nur Chusnul; Sajarwan, Akhmat; Tinting, Ruben; Mau, Antonius; Ichriani, Gusti Irya
PLANTA TROPIKA Vol. 10 No. 2 (2022)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v10i2.12833

Abstract

Rorippa indica L. Hiern is a local vegetable that is widely consumed by Dayak’s tribe in Central Kalimantan, Indonesia. It is mostly traditionally cultivated without fertilizers, resulting in low productivity. The research aimed to investigate the effect of fertilizers and soil type on the growth characteristics and N uptake of R. indica. The experiment was arranged in a factorial completely randomized design consisting of two factors with four replications. The first factor was fertilizer application (control, 20 t ha-1 of chicken manure, and 600 kg ha-1 of NPK), and the second was soil type (peat and Ultisol). The results revealed that the interaction of fertilizers and soil type gave a non-significant effect on all variables observed, except N uptake. The application of NPK increased the plant height and number of leaves significantly. Compared to control, the increment was 112.50% and 130.32%, respectively, and chicken manure application increased the dry weight (327.87%), N total (310.16%), and N uptake of plants by 478% in peat soil and 228% in Ultisol. This finding concludes that 20 t ha-1 of chicken manure can be applied to increase the productivity of R. indica.
Water Retention and Saturation Degree of Peat Soil in Sebangau Catchment Area, Central Kalimantan Sajarwan, Akhmat; Jaya, Adi; Banuwa, Irwan Sukri
JOURNAL OF TROPICAL SOILS Vol. 26 No. 1: January 2021
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2021.v26i1.29-42

Abstract

Water is an essential factor in forming, utilization, management, and sustainability of peat soil. This study was to obtain characteristics of water retention and porosity of peat soil. Peat samples were taken from the Natural Laboratory of Peat Forest, Central Kalimantan at shallow, medium, and deep peat at 0-50cm (surface) and 50-100 cm (subsurface), while laboratory analyses carried out at Soil Laboratory, Universitas Gajahmada. The result shows that volumetric moisture content at the surface lower than subsurface, except for deep peat. The total pore for the surface was 84.67-86.98%, while subsurface layers were 83.53-86.93%. For surface layer, saturated degree (S) medium peat higher than shallow and deep peat, while for shallow subsurface peat higher than medium and deep peat. S value all pF levels of surface for medium and deep peat higher than the subsurface. Bulk density for surface was 0.094g.cm-3 (rb(wet)) and 0.22g.cm-3(rb (dry)) for shallow peat while medium peat are 0.084–0.087g.cm-3(rb(wet)) and 0.18–0.20g.cm-3(rb(dry)), deep peat 0.064–0.090g.cm-3(rb(wet)) and 0.11–0.16g.cm-3(rb(dry)). For subsurface, bulk density of medium peat are 0.094–0.107g.cm-3 (rb(wet)) and 0.16–0.20g.cm-3 (rb(dry)), deep peat are 0.067–0.090g.cm-3 (rb(wet)) and 0.10–0.17g.cm-3 (rb(wet)). The particle density of surface and subsurface for shallow peat higher than medium and deep peat, with values 0.67-0.77g.cm3, 0.61-0.66g.cm3, and 0.53-0.63g.cm3 for shallow, medium, and deep peat, respectively. Total pores for the surface layer decrease with increasing dry bulk density (R = 0.624) and particle density (R = 0.375). This fact seems to confirm a directly proportional relationship between parameters bulk and particle density with total pores.
RETENSI AIR DAN DERAJAT KEJENUHAN TANAH GAMBUT DARI KAWASAN DAS SABANGAU Sajarwan, Akhmat
Jurnal Ilmu-Ilmu Pertanian Vol. 27 No. 2 (2020): Desember
Publisher : Politeknik Pembangunan Pertanian Yogyakarta-Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55259/jiip.v27i2.82

Abstract

Air berperan penting dalam proses pembentukan, pengolahan, manajemen pemanfaatan, dan pelestarian tanah gambut. Tujuan penelitian ini adalah untuk mendapatkan karakteristik retensi air dan derajat kejenuhan tanah gambut. Penelitian dilaksanakan di Laboratorium Alam Hutan Gambut, Kalimantan Tengah, tahun 2007 sampai dengan tahun 2014. Contoh gambut diambil dari tiga kategori ketebalan gambut, yaitu Gambut Dangkal (SP), Gambut Sedang (MP) dan Gambut Dalam (DP), dari lapisan permukaan (0-50 cm atau L-1) dan lapisan sub permukaan (50-100 cm atau L-2). Kadar lengas volumetrik (θw) L-1 selalu lebih rendah dari L-2, kecuali untuk DP, dimana kadar lengas pada aras pF1; pF2 dan pF 2,54 pada L-1 lebih tinggi dari L-2. Kadar lengas DP, L-1 masing-masing senilai 29,36%, 17,59% dan 13,37% untuk aras pF 1, pF 2, dan pF 2,54, lebih rendah dari L-2, senilai 36,77%, 18,90 % dan 14,51 % pada nilai aras pF yang sama. Nilai rata-rata total pori pada L-1 kategori SP, MP dan DP berturut-turut adalah 84,67%, 86,40% dan 86,98%. Pada L-2, nilai rata-rata total pori kategori SP, MP dan DP berturut-turut adalah 83,53%, 84,56%, dan 86,93%. Nilai derajat kejenuhan (S) semua aras pF pada L-1 kategori MP cenderung lebih tinggi dari SP dan DP, kecuali pF 4,20; dimana nilai S untuk SP (22,35%) lebih tinggi dari MP (10,63%,) dan DP (7,53%). Selanjutnya, untuk L-2, nilai S untuk SP cenderung lebih tinggi dari MP dan DP, kecuali pF 0, dimana MP mempunyai nilai S yang lebih tinggi dari SP dan DP.
Co-Authors Adi Jaya, Adi Chotimah, Hastin Ernawati Nur Chusnul GUSTI IRYA ICHRIANI, GUSTI IRYA Irwan Irwan Mau, Antonius Tinting, Ruben