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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) SAINS TANAH - Journal of Soil Science and Agroclimatology Journal of Science and Science Education (JoSSEd) Journal of Soil Quality and Management
Mahrup Mahrup
University of Mataram
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Neuroscience Physics

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Influence of biochar amendments on the soil quality indicators of sandy loam soils under cassava–peanut cropping sequence in the semi-arid tropics of Northern Lombok, Indonesia Sukartono Sukartono; Bambang Hari Kusumo; Suwardji Suwardji; Arifin Aria Bakti; Mahrup Mahrup; Lolita Endang Susilowati; Fahrudin Fahrudin
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 19, No 2 (2022): December
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v19i2.65452

Abstract

Low nutrient retention and soil organic matter depletion are the major challenges of the cropping system in the sandy loam soils of Northern Lombok, Indonesia. A field experiment was conducted to evaluate the influence of biochar-based organic amendments on the soil quality of sandy loam soils under cassava (Manihot Esculenta, Crants)–peanut (Arachis Hypogeae L.) cropping sequence. The treatments were as follows: biochar (10 ton ha-1) and rice straw  (3 ton ha-1)  (B1);  biochar  (10 ton ha-1), cattle manure (10 ton ha-1), and rice straw (3 ton ha-1) (B2);  biochar (10 ton ha-1)  and cattle manure (10 ton ha-1) (B3);  biochar (10 ton ha-1) and cattle manure (10 ton ha-1) plus rice straw mulch (3 ton ha-1) applied on surface soils (B4),  and without organic amendments (B0) as control. Results showed that the biochar-based organic amendments significantly improved several soil quality indicators such as SOC, total N, available P, Ca, cation-exchange capacity (CEC), and aggregate stability but had no significant effect on pH, K, and Mg. Improvement in soil quality was strongly indicated by an increase in the growth and yield of cassava and peanuts. Treatments B1, B2, B3, and B4 generally had a comparable effect on soil parameters and tended to improve the growth and yield of cassava and peanuts. Cassava was responsive to treatments B2 (biochar, cattle manure, and rice straw) and B3 (biochar and cattle manure) with its actual yield of 27 tons ha−1, which is a 40% increase compared with that in the control. As a secondary crop growing after cassava, peanuts also exhibited higher yields in all amended plots compared with that in the control. The highest yield was obtained in B2 (1.38 ton ha−1), followed by B4 (1.36 ton ha−1), B1 (1.33 ton ha−1), and B3 (1.25 ton ha−1). In conclusion, the incorporation of biochar, cattle manure, and crop residues (rice straw) into soils is a promising option to maintain soil quality and sustainably produce cassava and peanuts in the sandy loam soils of the semi-arid tropics of Lombok, Indonesia.
The Effectiveness of Bio Activator of Phosphate Solubilizing Bacteria Consortium on Composting Bag-log Waste Incorporated with Cow Dung Lolita Endang Susilowati; Mahrup Mahrup; Zaenal Arifin; R. Sutriono
Jurnal Penelitian Pendidikan IPA Vol 9 No 2 (2023): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i2.2755

Abstract

Bag-log waste is an organic material that is difficult to decompose. This is due to the bag log's high content of lignin compounds. Therefore, to speed up the composting process, it is necessary to include other organic materials and bio activators. This study aims to analyze the effectiveness of the bio-activator consortium of Phosphate Dissolving Bacteria (KBPF) in composting bag-log waste mixed with cow dung. The experiment consisted of 5 treatments with three replications, namely (T1) bag-log waste, (T2) a mixture of bag-log waste and cow manure with a composition of 1:2 (wt/wt), (T3) a mixture of bag-log waste and cow manure with 2:1 ( wt/wt), (T4) a mixture of bag-log waste and cow manure with a composition of 1:2 (wt/wt) plus KBPF (200 ml) with a density of 108 CFU/ml (T5) a mixture of bag-log waste and cow manure with a composition of 2:1 (wt/wt) plus KBPF (200 ml) with a density of 108 CFU/ml. The experiment was created as - Completely Randomized Design (CRD). The experimental results show that bag-log waste cannot be decomposed fastly without cow dung and bio activators. The treatments of T2, T3, T4 and T5 produced compost with quality not significantly different from one another. Under these treatments, the temperature was controlled in the mesophilic stage, and the composting pH was returned to neutral, while the moisture content and C/N ratio decreased to almost half of their original levels at the end of the composting period. It seems that inoculation of KBPF into the mixture of cow dung and bag-log waste has no role in accelerating the composting process. The mix of Bag-log and cow dung, with a minimal proportion of 2:1 without inoculation KBPF, was the recommended combination in composting bag-log in which the final product (compost) could fulfil its pH (neutral), the threshold of temperature and water content.  The C/N ratio of the treatment was close C/N ratio of mature compost, and total N and total P contents were more than the standard of SNI 19-7030-2004.
Root Distribution Pattern of Three Chili Varieties on Vertisol Soil, Central Lombok Zuhdiyah Matienatul Iemaaniah; Mahrup Mahrup; Lolita Endang Susilowati
Journal of Science and Science Education Vol. 4 No. 2 (2023): October
Publisher : Pascasarjana, Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jossed.v4i2.5238

Abstract

Plant roots have an important role in plant growth. Roots function as absorbers of water and other nutrients in the soil which are distributed to other body organs. Distribution patterns, root growth and root range influence plant growth and development. Vertisols are one of the dominant soil orders in southern Lombok, but their physical characteristics are rich in monmorillonite type clay which expands when wet and shrinks when dry. This study aims to analyze the pattern of root distribution through the root growth rate of the three chili varieties and to analyze the tolerance level of the three chili varieties. The field experiment was organized according to a Randomized Completely Block Design with three replications. The varieties of chili plants planted are Kara chilies, Dewata chilies and local chilies. Root growth rate was measured on serial plant samples observed every 20-day interval until day 60, during the growth period. The results obtained showed that the distribution patterns of the three varieties experienced an increasing trend in the rate of root growth, for the kara varieties it reached a figure of 4.65 cm, for local varieties is 5.54 cm; and in the dewata variety it is 2.67 cm. The tolerance level of chili plants to congested conditions was seen from the results of their root growth rates, the three varieties showed that they were Semi Tolerant (ST) to waterlogged environmental conditions on vertisol soils.
Analisis Nisbah Dispersi dan Stabilitas Agregat Tanah pada Penggunaan Lahan SisteM agroforestri di Lahan Miring Khaerul Umam; I Gusti Made Kusnarta; Mahrup Mahrup
Journal of Soil Quality and Management Vol. 1 No. 1 (2022): Journal of Soil Quality and Management
Publisher : Department of Soil Science, Faculty of Agriculture, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jsqm.v1i1.18

Abstract

Agroforestry is a form of conservation principle in maintaining land productivity. The various variations that exist in agroforestry will be able to improve soil physical properties, especially the dispersion ratio and stability of soil aggregates, these physical properties will help in resisting the pressure or force of the falling raindrops. This study aimed to determine the effect of land use by agroforestry systems on the dispersion ratio and stability of soil aggregates on sloping land. The research method used is the descriptive method with sampling done diagonally. There were 3 agroforestry systems (clove-based agroforestry, coffee-based agroforestry, and durian-based agroforestry) which were studied in 3 replications with upstream, middle, and downstream positions. This research was conducted in January-June 2020 in Santoni Village, Kayangan District, North Lombok. Two main parameters were tested, namely the dispersion ratio and the stability of soil aggregates. The results showed that the average value of the ratio of land dispersion indicated by coffee-based agroforestry was 79.85% and the highest was clove-based agroforestry of 91.56%, these values ​​belong to the highly dispersed class. Unlike the case with soil aggregate stability, the highest average soil aggregate stability value was shown in coffee-based agroforestry of 109 and the lowest was clove-based agroforestry of 60. The soil aggregate stability value when interpreted as coffee-based agroforestry was classified as very stable clove-based agroforestry is a relatively stable class. Coffee-based agroforestry is best applied on sloping land so that soil erosion and land productivity can be maintained.
Co-Authors Arifin Aria Bakti Bambang Hari Kusumo Fahrudin Fahrudin I Gusti Made Kusnarta Khaerul Umam Lolita Endang Susilowati R. Sutriono Sukartono Suwardji Suwardji Zaenal Arifin Zuhdiyah Matienatul Iemaaniah