Jurnal Ilmu Pertanian Indonesia

7-12

Authors: Raden Haryo Bimo Setiarto, Nunuk Widhyastuti

Tacca (Tacca leontopetaloides) is plant that grows in coastal areas and high salinity, especially in the south coast of West Java. Tacca tubers have high content of carbohydrate, but it also contains some toxic compounds such as: taccaline, β – sitosterol, alcohol cerylic, and steroid sapogenin that are harmful for health. Fermentation on tacca tubers can change amylograph properties and proximate levels of modified tacca flour and reduce it toxic compounds. This study aimed at determining the effects of lactic acid bacteria (LAB) Lactobacillus plantarum B307 fermentation on the proximate levels and amylograph characteristics of modified tacca flour. Moisture and ash content of modified tacca flour still meet the requirements of SNI. Fermentation LAB Lactobacillus plantarum B307 led to increased levels of protein and lactic acid in the modified tacca flour, but it decreased pH value and carbohydrate content. Based on the analysis of amylograph, it can be concluded that tacca flour control without fermentation has the best gelatinization profile because it has good ability of setback viscosity.

20-25

Authors: Dini Yuliani

The objective of this study was to determine the effect of Metarhizium anisopliae and Andrographis paniculata to the natural enemies of Nephotettix virescens and non-target insect pests. This research was conducted in tungro endemic areas in Subang District, West Java in the wet season 2013/2014. The method of research used a split plot design with four replications. The main plot was IR66, Inpari 9, and Ciherang varieties. Subplot was the application of M. anisopliae, A. paniculata, and control. Observations were carried out five times started at nursery (2 weeks after seedling), 14, 28, 42, and 56 days after planting using insect nets, double swing 10 times on each plot observations. The results show M. anisopliae and A. paniculata not adversely affect on non-target insect pests such as Chironomid and natural enemies of N. virescens namely Lycosa pseudoannulata, Cyrtorhinus lividipennis, Sepedon sp., damselfly, Tipulidae sp., Telenomus sp., dragonfly, and Tetrastichus sp.. Efficacy of M. anisopliae and A. paniculata as one of the control strategies that are environmentally friendly and proved not harmful to non-target insect pests.

35-40

Authors: Nadya Adharani, Kadarwan Soewardi, Agung Dhamar Syakti, Sigid Hariyadi

Biofloc technology is one of the alternative to overcome the problem of water quality of cultivation environment which was adapted from conventional waste management techniques. The purpose of this study was to assess the young catfish culture by applying bioflocs of some consortium products, such as Bacillus megaterium (BM), Supernit (SP), Depok 165 (DP165), Kayajaga (KJ) compared to non biofloc application for improving the water quality. The results of this study and statistical test showed that the lowest concentration of TAN by probiotic KJ was about 2.56 mg L-1, while the control was about 5.47 mg L-1, and the consortium of bacteria gave effect to TAN value (p<0.05). The Lowest concentration of amonia by probiotic KJ was about 0.0001853 mg L-1, while control was about 0.0003973 mg L-1, and the consortium of bacteria did not give effect to amonia value (p>0.05). The lowest concentration of nitrite by probiotic BM was about 0.065 mg L-1, while the control was about 0.124 mg L-1, and the consortium of bacteria gave effect to the nitrite value (p<0.05). The lowest concentration of nitrate by probiotic BM was about 1.203 mg L-1, while the control was about 3.437 mg L-1, and the consortium of bacteria gave effect to the nitrate value (p<0.05). Consortium of bacteria gave effect to the COD value (p<0.05), but all bioflocs treatments had an average value of COD higher than the control. The conclusion that the bioflocs aplication was able to improve the water quality shown by decreasing parameter values of TAN concentrations, ammonia, nitrite, and nitrate.

48-55

Authors: Arbi Mei Gitarama, Majariana Krisanti, Dewi Ratih Agungpriyono

The residue of human activities and batik industrial waste water surrounding the river will be able to increase the accumulation of chromium and to disrupt macrozoobenthic communities in the river. The aims of this study was to assess the impact of human activities surrounding the river to the macrozoobenthic communities and the accumulation of chromium in Cimanuk Lama River, Indramayu District, West Java. The study has been conducted from AprilMay 2015 based on three times sampling at three different sampling stations. The result of this study shows that the chromium accumulated in the waters of all station still meet the standard quality ranging from 0,010-0,016 mg/l, but only station 1 fulfills the standard quality for chromium accumulated in the river sediment with the range of all stations was about 11,72-46,63 mg/kg. The results also show that the community index analysis describes the change of macrozoobenthic community at all stations caused by environmental pressure, especially at the station 2 which is indicated by the highest score of Family Biotic Index. The accumulation of the chromium in the waters and the change of macrozoobenthic community structure are mostly influenced by the use of the Cimanuk Lama river long for agricultural and fisheries activities, and also batik home industry.

63-68

Authors: Bramada Winiar Putra, Asnath Maria Fuah, Henny Nuraini, Rudy Priyanto

Morphometric measurements using digital image technique give a lot of benefits i.e., a safer method both for the researchers and the experimental animals, produce a more accurate morphometric data, reduce the stress in the experimental animals and produce a more detail and complete morphometric data. This experiment used 20 Ongole cross cattle and 20 Bali cattle with the average age of 3 years. Digital image data were collected by using DSLR camera with 18Mp resolution. The collected digital image data were analyzed by using Image J program. Parameters measured in this observation were body length, body height, hip height, pelvic height, loin height, the length of ossa vertebrae cervicales, the length of ossa vertebrae thoracicae, the length of ossa vertebrae lumbales, the length of os scapula, the length of os humerus, the length of ossa radius-ulna, the length of os metacarpale III, the length of os femoris, the length of ossa tibia-fibula, and the length of os metatarsale III. Digital image technique could replace the manual technique for morphometric measurement with a lower level of variance (<10%). Application of digital image technique for measurement of morphometric parameters in Ongole Cross and Bali cattle showed that Bali cattle has a potential for muscle deposition in body frame and body axis while Ongole Cross cattle has a potential for muscle deposition in fore and hind legs.