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All Journal Journal of Tropical Soils The Indonesian Green Technology Journal AGRIVITA, Journal of Agricultural Science
Syekhfani Syekhfani
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science Other

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Mulches application and shading to improve tuber yield of shallot (Allium ascalonicum L.) Cv. Palu Bahrudin Bahrudin; Syekhfani Syekhfani; T. Wardiyati; M. Santoso
The Indonesian Green Technology Journal Vol 1, No 2 (2012)
Publisher : Program Pascasarjana Universitas Brawijaya

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Abstract

Optimal growth environment particularly solar radiation intensity and temperature are the important factors to reach maximum yield of shallot crop. The average production of shallot at central Sulawasi about 4.3 ton ha-1,  it is below the national production (8.8 ton ha-1) (Board of Statistic Center, 2000). It is the reason to improve agrotechnology to get the best yield of the Palu local cultivar. The objective of this research is to evaluate effects of shading level and mulches on growth and tuber yield of shallot.  The research was conducted on a low altitude, 20 meters above sea level, Sidera district, Sigi Biromaru, Donggala regency.  The average temperature of the area is 34 -37°C during day and 22 – 23.2ºC during night, with the relative humidity 71 – 77%.   The field experiment on  environmental modification  using polynet shading and mulches was arranged in the Randomized Complete Block Design with two factors: (1) mulches application: without mulch, black silvery plastic mulch; and (2) Polynet shading: without shading, 30 % shading and  60 % shading. Results of experiment suggest that application the black silvery plastic mulch  and 30 % shading produced bulb fresh weight  1.048 kg/m2 equal to 10.48 tons ha-1, it is higher then the control treatment which produces 0.453 kg/m2 equal to 4.53 tons ha-1. Key words: mulches, shading, shallot.
GROWTH AND PHYSIOLOGICAL CHARACTERISTICS OF SOYBEAN GENOTYPES (Glycine max L.) TOWARD SALINITY STRESS Nurul Aini; Syekhfani Syekhfani; Wiwin Sumiya Dwi Yamika; Runik Dyah P.; Adi Setiawan
AGRIVITA Journal of Agricultural Science Vol 36, No 3 (2014)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v36i3.468

Abstract

The research aimed to determine the tolerance limit of soybean genotypes toward salinity stress, plant growth and physiological characteristics. It was conducted in green house, from April to August 2013. The study involved two activities.  The first activity for evaluating a salinity stress, consisted of four levels of soil salinity (EC): 0.9; 4; 7; 10 dS m-1 and eleven genotypes. The second one to obtain information about changes in physiological and morphological characteristics of soybean affected by salinity stress. The second activity concisted of two soil salinity levels (EC): 1.52 dS m-1 and 8.58 dS m-1. The results showed that at salinity 10 dS m-1, all varieties/genotypes were not able to survive until the age of 43 days after sowing (DAS). At salinity 4 dS m-1, total plant dry weight of most geno-types soybean decreased by 48.14%, while the salinity of 7 dS m-1 total plant dry weight of all soybean decreased by 64.89%. Concentration of K and Na in soybean leaves were higher than those in soybean root tissue. The content of K and Na in leaves and roots of most soybean genotypes increased as soil salinity increased from 1.52 to 8.58 dS m-1, except for genotype G11. Keywords: leaf chlorosis, necrosis, salinity tole-rant, soybean genotype
Pengaruh Kombinasi Senyawa Humik dan CaCO3 terhadap Alumunium dan Fosfat Typic Paleudult Kentrong Banten Winarso, Sugeng; Handayanto, Eko; Syekhfani, Syekhfani; Sulistyanto, Didik
JOURNAL OF TROPICAL SOILS Vol. 14 No. 2: May 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i2.89-95

Abstract

Effect of Humic Compounds and CaCO3 Combination on Aluminium and Phosphate of Typic Paleudult Kentrong Banten (S. Winarso, E. Handayanto, Syekhfani and D. Sulistyanto): Decomposition of organic matter releases humic compounds, that can chelate metals include Al in acidic soils. This chelation of Al is important for decreasing of Al activity and P fixation in acidic soils. This study was aimed to test the effect of humic compounds extracted from rice-straw compost and CaCO3 combination on aluminium activity and phosphate (available P) on an Ultisol (Typic Paleudult) collected from Kentrong Banten.  A laboratory study was conducted by series consentration of CaCO3 (0, 500, 1.000, 2.000, dan 3.000 ppm) in 8 grams of acidic soil. The acidic soil had previously been subjected to continuously addition of humic compounds and none. Then, these mix of soil and CaCO3 were added 40 ml contained 5.000 ppm humic compounds to obtain 1:5 soil:suspension ratio and  control was made by using aquadest. They were shaked for 2 hours every day and pH was measured. At 11st days incubation  Alexch (N KCl) and soluble of P (PB and PC) were measured.  The results  showed that liming or addition of CaCO3 to the acidic soils decreased Alexch (precipitated to be Al(OH)3) linearly with formula y = -0.778x + 6.108; y = Alexch (Cmol kg-1), x = CaCO3 (M); R² = 0,916. Combination addition of humic compounds and CaCO3 was able to increase pH and Alexch up to not detected. The increased of P-soluble or desorption P untill 384% took place at addition of 0.0016 M CaCO3 and 5000 ppm humic compounds. More desorption of P was observed if the acidic soils has previously been subjected to continuously addition of humic compounds, such us the increased of soluble P up to 739% at addition of CaCO3 0.0008 M.
Co-Authors Adi Setiawan Aini Nurul Bahrudin Bahrudin Didik SULISTYANTO Eko Handayanto M. Santoso Runik Dyah P. Sugeng Winarso T. Wardiyati Wiwin Sumiya Dwi Yamika