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SAINS TANAH - Journal of Soil Science and Agroclimatology

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Published by Universitas Sebelas Maret

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Articles 7 Documents

Search results for , issue "Vol 15, No 2 (2018): December" : 7 Documents clear

Enhancing Chromium Phytostabilization Using Chelator (Agrobacterium sp. I26 and Manure) to Support Growth and Quality of Rice (Oryza sativa L.) Riani Dwi Utari; Mohammad Masykuri; Retno Rosariastuti
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 2 (2018): December
Publisher : Universitas Sebelas Maret

There are many of rice field which is located near the industrial area. The industrial waste contains heavy metals (chromium) which will cause contamination of rice if the waste isn’t treated properly. The used of chemical fertilizers can cause chromium contamination. It needs an effort to do remediation, such as using phytostabilization mechanism. This research aimed to determine the role of chelator in chromium phytostabilization and its influence on the growth and quality of rice. The study was conducted in Waru village, Karanganyar in May to October 2018. This research was factorial design used completely randomized block design with two factors, namely chemical fertilizers and chelator (Agrobacterium sp. I26, and manure). The parameters observed are chromium content and uptake by plant tissues (roots, shoot and rice), plant height and a number of clumps. Research output was without chemical fertilizer-chelator Agrobacterium sp. I26 that can increase the chromium uptake in roots as big as 95.38 %, increased up to 10 % in the shoot and decreased up to 92.38 % in rice compared to control. Application of Agrobacterium sp. I26 can be recommended to produce good quality and quantity of rice (good growth and free from harmful pollutants such as chromium metal).

Ratoon Systems in Tidal Lowland: Study of Groundwater Dynamics and the Change of Nutrient Status on Rice Growth Momon Sodik Imanudin; Bakri Bakri; Raina Jelita
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 2 (2018): December
Publisher : Universitas Sebelas Maret

It has been widely known that crop cultivation in tidal lowland areas in the second crop (March-April) is not conducted by farmers in a maximum way. Thus, this research aims at investigating the dynamics of groundwater and its nutrient status condition for the purpose of supporting plant cultivation in the second crop after rice planting. The study was conducted in Banyu Urip Village, Tanjung Lago Telang II, Banyuasin. The plant used in this activity was paddy, with the treatment of a ratoon cultivation system. The ratoon system is paddy cultivation by using the first paddy planting season shoots. A urea treatment was given with a dose of 0 kg/ha (control) and a dose of 150 kg/ha. The results of soil analysis showed that, although not significant, there was an increase in the nutrient status of the soil condition. Therefore, it can be concluded that fertilizing was considered ineffective for the system of ratoon cultivation. The study of groundwater dynamics showed that at the early phase, a groundwater table was dropped above 30 cm (critical) but it could increase by the rain and water retention in the canal. The average of the groundwater table during the ratoon period was at the depth of 5-30 cm below the soil surface, allowing it to be suitable for plant growth. The plant growth at B treatment was better and its production was 2.8 ton/ha. This 2.8 ton/ha plant production was classified as a high category for paddy with the ratoon cultivation system. There is no effect of the fertilizer treatment on the nutrient status in the soil. Moreover, the application of fertilizer did not give a significant result on the production of rice.

Nutrient Release Performance of Starch Coated NPK Fertilizers and Their Effects on Corn Growth Nur Izza Faiqotul Himmah; Gunawan Djajakirana; Darmawan Darmawan
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 2 (2018): December
Publisher : Universitas Sebelas Maret

One way to control or slow down the nutrient release rate from fertilizer is by coating technique. Nowadays the use of biodegradable coating materials for slow-release fertilizer (SRF) is preferable because of environmental issues. This research was aimed to make SRF using starches and cellulose as the coating materials and to test the release rate of the nutrients. Five kinds of starches (cassava, corn, sago, wheat, and glutinous rice) and carboxymethyl cellulose (CMC) were used as coating material for granulated NPK fertilizer. The coated fertilizers (NPK SRF) were tested for their leaching rate in the soil by percolation experiment. The results showed that the kind of starch used influenced the release rate of the NPK SRFs. The NPK SRF coated with sago starch exhibited slow release rate and low leached nutrients which also resulted in slow growth of corn plant, as expected of SRF. The use of starch and CMC as biodegradable coating materials in this research has a possibility to affect the microbial activity in the soil so that the nutrient release became faster than the uncoated NPK fertilizer.

Soil Carbon Transitions Supporting Climate Change Mitigation Kurniatun Hairiah
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 2 (2018): December
Publisher : Universitas Sebelas Maret

Maintaining and where feasible restoring soil carbon stocks is part of all sustainable development strategies that have a chance of meeting the global commitment of the Paris Agreement to contain global warming within a 1.5oC limit. Active policies to incentivize increased soil carbon storage require understanding of the drivers of soil carbon decline, as well as the conditions under which soil management leads to an increase. Soil carbon transitions -- shifts from decline to increase of soil carbon stocks -- have been recorded as part of agricultural intensification. Organic inputs supporting soil carbon may primarily depend on roots, rather than aboveground inputs, and thus on the choice of crops, trees, and grasses that make up an agricultural land use system.

Studying the Solubility, Availability, and Uptake of Silicon (Si) from Some Ore Minerals in Sandy Soil Rama T. Rashad; Rashad A. Hussien
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 2 (2018): December
Publisher : Universitas Sebelas Maret

The solubility and availability of Si from the feldspar, silica, and zeolite as Si-bearing minerals were studied in a sandy soil. Silicon uptake by the soybean (Glycine max L.) plant was discussed. The minerals used were applied before planting in two separate rates; rate 1 ≈ 595.2 and rate 2 ≈ 1190.5 kg ha-1 accompanied by a ≈ 4.8 kg ha-1 constant rate of the K-humate sprayed as a solution on soil after planting in a complete randomized block design. The dissolved Si from the different minerals at rate 2 followed an opposite direction to their SiO2 percentage that may be due to the structural differences: silica (1.46 mg kg-1 - SiO2 =98.4%) < zeolite (1.71 mg kg-1 - SiO2 =75.9%) < feldspar (2.09 mg kg-1 - SiO2 = 71.9%). The individual mineral treatments at rate 2 have almost decreased the available NPK estimated after soybean harvesting. The K-humate has enhanced the effect of silica at rate 2 for the available N and P. The soybean seed yield (kg ha-1) increased significantly by 117.9% for the S1 + H, 109.2% for K-humate and 57.5% for the Z2 + H. The seeds’ Si (mg kg-1) increased significantly from 3.6% to 102.9% affected by the silica treatments.

Local Air and Soil Temperature Modeling Using Himawari 8 Satellite Imagery Adhia Azhar Fauzan; Komariah Komariah; Sumani Sumani; Dwi Priyo Ariyanto; Tuban Wiyoso
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 2 (2018): December
Publisher : Universitas Sebelas Maret

Himawari 8 satellite image, which was launched in October 2014 and began the operational in July 2015, serves to identify and track the phenomenon of rapid changes in weather. The purpose of this research was to determine the model of local air and soil temperatures using Himawari 8 satellite image. Local air and soil temperatures information was collected from the Climatology Station of Semarang district, Central Java, Indonesia. Interpretation of the Himawari 8 satellite image was performed, as well as the statistical tests of correlation and regression, according to the sun's pseudo motion. Pair correlation and regression analysis on satellite image with air temperature; and air temperature with soil temperature (bare and grass). The results showed the satellite imagery of Himawari 8 could predict the air and soil temperatures, especially bare soil. In specific, the accuracies were higher on soil temperature at 0 (surface) and 5 cm depth. But each period produced vary accuracy, due to many weather elements had may affect the air and soil temperatures.

The Effects of Inorganic Fertilizer and Mineral Leucite Residues on K Uptake and Maize Yields (Zea mays L.) in Oxisols Sri Hartati; Slamet Minardi; Wiwik Hartatik; Isna Luthfa Haniati
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 2 (2018): December
Publisher : Universitas Sebelas Maret

The purpose of this study was to determine the effect of inorganic fertilizer and leucite mineral residues on K uptake and maize yields. This research had been conducted from October 2016 to September 2017 in the experimental field of Neglasari, Dramaga, Bogor. The soil was analyzed in the Soil Chemistry and Fertility Laboratory of Sebelas Maret University, Surakarta. The study was arranged in a completely randomized block design using 11 treatments with three replications. The result showed that the NPK 150 kg ha-1 residues gave a better effect on corn yields whereas there was no significant effect of employing the standard NPK with RAE value of 123%. The study found that the residual treatment of inorganic fertilizers and leucite minerals had a significant impact on maize yields but not on K uptake.

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