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All Journal Indonesian Journal of Geography Journal of Tropical Soils Jurnal Agrotek
Siane, Bless Aplena Elen
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science

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Spatial Distribution of Trace Elements in Rice Field at Prafi District Manokwari Aplena Elen S. Bless; Samen Baan; Yahya Darmawan
Indonesian Journal of Geography Vol 48, No 1 (2016): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9091.114 KB) | DOI: 10.22146/ijg.12430

Abstract

Mapping spatial variability of trace elements in rice Ḁeld is necessary to obtain soil quality information to en-hance rice production. ἀis study was aimed to measure concentration and distribution of Zn, Cu, Fe, Pb, and Cd in two diᴀerent sites (SP1, SP2) of PraḀ rice Ḁeld in Manokwari West Papua. ἀe representative 26 soil samples were analysed for their available trace metal concentration (DTPA), soil pH, and C-organic and soil texture. ἀe result indicated that Fe toxicity and Zn deḀcient problems were encountered in both sites.  Rice Ḁeld in SP2 was more deḀcient in Zn than SP1. Site with the highest trace elements (Zn, Fe, Cu, and Cd) concentration had low soil pH and high C-organic. Acidic soil has higher solubility of metals; while high C-organic could improve the formation of dissolve organic carbon-metal binding, hence it improving the trace metals concentration in soil solution.
Status ketersediaan fosfor dan penyerapannya oleh kedelai (Glycine max L. Merril) akibat pemberian amelioran pada ultisol warmare Ishak Musa’ad; Alce Ilona Noya; Marce Naa; Aplena Ellen Bless
Agrotek Vol 8 No 2 (2020): Desember
Publisher : Fakultas Pertanian Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.338 KB) | DOI: 10.46549/agrotek.v8i2.196

Abstract

The aim of this study was to determine the interaction between ameliorant andvarieties on soybean growth and P nutrient uptake in Ultisol soil at Warmare. This researchwas conducted using a randomized block design (RAK) in two factors, namely ameliorant(A) of manure as the main factor consisting of 3 levels including: A0 (without ameliorant),A1 (chicken manure) and A2 (goat manure). Soybean varieties (V) as the second factorincluded: V1 (Anjasmoro) and V2 (Wilis). The results showed that the interaction betweenameliorant and variety siginificantly affected plant height at 5 week, number of trifoliateleaves at 3 week, number of branches and nutrient uptake of P. Giving goat manureameliorant to Anjasmoro variety produced the highest plant (48.42 cm) at 5 week. Theapplication of chicken manure and goat manure to the Anjasmoro variety produced thehighest number of trifoliate leaves (5.00 pieces) at 3 week. In the variable number ofbranches, the Wilis variety which was given goat manure obtained the highest number ofbranches (5.66 branches). The highest nutrient uptake of P (9.77 g) was found in theAnjasmoro variety which was given chicken manure.
Citrate Root Exudation under Zn and P Deficiency Siane, Bless Aplena Elen
JOURNAL OF TROPICAL SOILS Vol. 17 No. 3: September 2012
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2012.v17i3.219-225

Abstract

Zinc and phosphorus are essential nutrients with low bioavailability in calcareous soils. Some plants exude organicacids to increase the solubility of these two nutrients. The objective of this study was to examine citrate exudation rates of different lupin (Feodora and Energy) and rapeseed (Dunkeld, Yickadee and Rainbow) cultivars under deficiencies of Zn and P. The plants were cultivated into three different nutrient solutions (complete, -Zn, and -P) with pH around 7. Under Zn deficiency, rapeseed cultivars lost about 80% of its shoot fresh weight, but the roots did not exude any organic acids such as citrate, malate or oxalate. Both lupin and rapeseed cultivars exuded citrate onlyunder phosphorus deficiency. The exudation rates of Feodora and Energy were 3.89 μmol g-1 RDW h-1 and 3.45 μmol g-1 RDW h-1, respectively, while that of Dunkeld was 15.1 μmol g-1 RDW h-1. The results indicated that lupin and rapeseed lost their production under Zn deficiency but they did not exude organic acid, while under P deficiency both plants exuded citrate.Keywords: Citrate; deficiency; exudation rate; lupin; phosphorus; rapeseed; Zn[How to Cite: Siane BAE. 2012. Citrate Root Exudation under Zn and P Deficiency. J Trop Soils, 17 (3) : 219-225. doi: 10.5400/jts.2012.17.3.219][Permalink/DOI: www.dx.doi.org/10.5400/jts.2012.17.3.219] 
Co-Authors Alce Ilona Noya Ishak Musa’ad Marce Naa Samen Baan Yahya Darmawan