Pengaruh Pemangkasan Batang dan Cabang Primer terhadap Laju Fotosintesis dan Produksi Jarak Pagar (Jatropha curcas L.)

Hariyadi ,

Abstract


This research was aimed to study the effect of stem and primary branch prunning on photosynthetic rate and production of physic nut. The experiment was conducted in IPB experimental station in Cikabayan, Darmaga, Bogor, from February 2007 until May 2008. A randomized block design with one factor was used in the experiment. The treatments were combination between stem pruning with various height from the soil surface and pruning of primary branches with various number of branch remained. Stem pruning on 40 cm above the soil surface with no branch pruning resulted in the highest photosynthetic rate (8.10 µmol CO2 m-2 s-1), while stem pruning on 20 cm above the soil surface with 2 primary branches remained resulted in the lowest photosynthetic rate (4.71 µmol CO2 m-2 s-1). Stem pruning on 40 cm above the soil surface without branch pruning produced the highest yield components, i.e., capsul number (207.3 capsul plant-1), seed number (506 seeds plant-1) and seed dry weight (323.81 g plant-1). Keywords: photosynthetic rate, production, stem prunning

Full Text:

PDF


DOI: https://doi.org/10.24831/jai.v39i3.14965

Editorial Office:
Department of Agronomy and Horticulture, Wing 13 Level 4
Faculty of Agriculture, IPB University
Jl Meranti, Kampus IPB Dramaga, Bogor 16680
Phone (0251) 8629351, Fax (0251) 8629353
Email: jurnal.agronomi@yahoo.com

Copyright Notice: 

All publications by Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) [p-ISSN: 2085-2916, e-ISSN: 2337-3652] is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.