Volume 8, Number 1, April 2016

Yield Potency of 25 Herbal Roselle Accessions in Dry Land

Untung Setyo Budi, Marjani, Rully Dyah Purwati

Indonesian Sweetener and Fiber Crops Research Institute
Karangploso, PO.Box 199, Malang
E-mail : This email address is being protected from spambots. You need JavaScript enabled to view it.

Accepted : April 29 2014; revised : May 5 2015; approved : March 1 2016

Abstract

To support herbal roselle development in the future, the availability of new high-yield varieties were required. Screening of 25 herbal roselle accessions have been carried out on dry land Muktiharjo, Pati District started in January–June 2011. The purpose of this study was to obtain some superior high-potential accessions suitable for dry land. The screening used a randomized block design (RBD) with two replicates. Seeds were planted with a spacing of 100 cm x 50 cm on a plot measuring 10 m x 5 m. Fertilizing and other maintenance in accordance with the standards for the cultivation of herbal roselle plant. Parameter observed consist of number of capsules per plant, weight of 100 dry petals, fresh capsule production, fresh petals production, and dried petals production per hectare. The results showed that eight accessions consistently showed productivity of dried roselle calyx higher than two varieties used as a control. Those accessions were no: 677, 679, 675, 681, 682, 684, 689, and 671, with the production of dried petals ranged between 385–676 kg/ha. There is a positive correlation between the number of capsules per plant with a production of capsules per hectare, production per hectare of fresh petals and dried petals, production per hectare with a correlation value 0.725, 0.617, and 0.584, respectively. A significant correlation was also found in the character of capsule production with the production of fresh petals and dried petals, the fresh petals production with the production of dried petals per hectare, and weights of 100 petals dried with dried petals production per hectare by correlation values: 0.978, 0.907, 0.939, and 0.502, respectively.


Effect of N and K Fertilizers Application on Production and Quality of Two Madura Tobacco Varieties

Mochammad Sholeh, Fatkhur Rochman, Djajadi

Indonesian Sweetener and Fiber Crops Research Institute
Karangploso, PO.Box 199, Malang
Email : This email address is being protected from spambots. You need JavaScript enabled to view it.

Accepted : November 24 2014; revised : February 15 2016; approved : March 21 2016

Abstract

Two varieties of madura tobacco which bears3–5 leaves, more than Prancak-95, Prancak N-1, and Prancak N-2 varieties, had been acquired. This study was aimed to obtain an optimal dose of N and K corresponding to those varieties. Research was conducted at Bajang Village, Pakong District, Pamekasan on January to December 2013. The treatments were arranged in split plots design with varieties were as the main plots and N and K dose rates were a subplot with 3 replicates. The varieties were : PrancakS1 Agribun and Prancak T1 Agribun. The subplots were 9 combinations of type and dose of N and K fertilizers: 1) 40 kg N + 25 kg K2O, 2) 50 kg N + 25 kg K2O, 3) 60 kg N + 25 kg K2O, 4) 40 kg N + 50 kg K2O, 5) 50 kg N + 50 kg K2O, 6) 60 kg N + 50 kg K2O, 7) 40 kg N + 75 kg K2O, 8) 50 kg N + 75 kg K2O, and 9) 60 kg N + 75 kg K2O/ha.Thirty six kg P2O5/ha and 5 tons manure/ha were added at 3 days before transplanting as a basic fertilizers. N was sourced from ZA and K of ZK, one third dose of N and K were added at 10 days after planting (DAP) and the rest of N and K dose were applied at 21 DAP. Observations included growth, yield, and quality of tobacco, rendement, grade and crop indexes, and nicotine analysis. In wet conditions of climate anomalies at the beginning of the dry season of 2013, the results showed that there were no difference between Prancak S1 Agribun and Prancak T1 Agribun varieties of madura tobacco in term of growth, yield, and quality. Contrast test results showed that increasing rates of N fertilizer had no effect on growth, yield and quality. However, increasing dose rates of K affected growth, yield and quality at a given rate of N. Combination of N and K affected length and width leaves, yield, and crop index. Based on crop index and benefit, that the fertilizer recommendation for varieties of madura tobacco Prancak S1 Agribun and Prancak T1 Agribun was 50 kg N + 36 kg P2O5 + 75 kg K2O + 5 tons manure/ha.


Factors Influencing Net Return of Transgenic Cotton Worldwide Over Time

Julian Witjaksono

Peneliti Muda, Balai Pengkajian Teknologi Pertanian Sulawesi Tenggara
Jln.Prof. Muh. Yamin No. 89 Puwatu,Kendari, Indonesia
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Accepted  : July 14 2015; revised : November 16 2015; approved : January 15 2016

Abstract

The evidence of metadata based on the economic benefits using genetically modified (GM) cotton with different patterns across space and time could be analysed. To this end, investigation on the effects of GM cotton using global data from more than one decade of field trials and surveys were done. More specifically, the effects of GM cotton on crop yields, seed costs, pesticide costs, management and labor costs, and net return were analyzed. Based on the literature searched, regression analysis was conducted to investigate and estimate the relationship between response variables and explanatory variables on these parameters. The results using a regression analysis approach indicated that yield gain was the high expectation of cotton growers to optimize net returns. Put in another way, yield gain is the main factor influencing net return. As such, this study concludes that GM cotton is the technology which can lead to yield increases and capture higher net return. More so, lessons from this study may contribute to the assessment of this technology especially for the poor-resource farmers in the developing countries. The application of this technology in Indonesia has to consider the agroecosystem and socioeconomic condition, as well as support from the government policy. Indeed, research and assessment in deep analysis should be done with the consideration of the factors above before implementing this technology.


Effect of PGPR on Suppresion of Root Knot Nematode Population (Meloidogyne incognita (Kofoid and White) Chitwood) on Kenaf (Hibiscus cannabinus L.)

Kristiana Sri Wijayanti1, Bambang Tri Rahardjo2, dan Toto Himawan2

1Indonesian Sweetener and Fiber Crops Research Institute
Karangploso, PO. Box 199 Malang
2 Plant Pest and Disease Department of Brawijaya University, Indonesia
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Accepted : January 6 2016; revised : March 3 2016; approved : March 7 2016

Abstract

Infection of Meloidogyne incognita on kenaf could affect its growth and the production of fiber. This study aimed to evaluate the effect of PGPR on the reduction of nematode M. incognita population on kenaf in the greenhouse. The factorial experiment was laid on randomized block design. The study consisted of two factors with three replicates . The first factor was method of PGPR application, ie: PGPR suspension was given before planting (kenaf seeds was soaked for 5 hours) (C1) and the seeds directly planted without submerged (C2), PGPR suspension was given at 15 days after planting (DAP) and 25 dap. The second factor was type of bacteria (Pseudomonas fluorescens, Bacillus subtilis, Azotobacter sp., P. fluorescens + B. subtilis, P. fluorescens + Azotobacter sp., B. subtilis + Azotobacter sp., and P. fluorescens + B. subtilis + Azotobacter sp.) and control. The results showed that submerged seed with the three bacterial rhizobacteria significant compared to the control treatment and single treatment and two combination rhizobacteria, while without submerged seed with single or combination rhizobacteria not significant on the population of juvenile nematodes in the soil. Combination of P. fluorescens and B. subtiliswith submerged seed capable of suppressing the population of juvenile nematodes in the roots of 43.28% when compared with or without submerged seed. Population of juvenile nematodes in the roots by submerged seed and without submerged seed either single or combination rhizobacteria do not affect each other. P. fluorescens suppress nematode eggs are highest 86.39% and disease intensity by 71,95% where compared to control.


Test on Three Packages of Cultivation Techniques for Physic Nutin Dry Land

Prima Diarini Riajaya, Sri Mulyaningsih,dan Budi Hariyono

Indonesian Sweetener and Fiber Crops Research Institute
Karangploso, PO. Box 199 Malang
E-mail : This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

Development of physic nut as an alternative energy source requires an optimized cultivation technology support. The field research was done in three consecutive years (2012–2014) in Asembagus Experimental Station, Situbondo to test physic nut cultivation technologies to improve productivity. Testing the cultivation technology package was performed on the new planted physic nut IP-3A, crop rejuvenation by grafting with entresIP-3A and pruning the IP-3A clone. Groundnut was planted as intercrop with physic nut, and after groundnut has been harvested, Crotalaria juncea was planted and harvested at the age of 45 days then mulched between physic nut plants. Yield components and yields of physic nut were recorded andaccumu-lated within a year. The application of cultivation technologies on new plating system resulted in agradually increase in seed yield from the first year to the third year consecutively, 253.6 kg/ha, 1,277.2 kg/ha, and 1,640.3 kg/ha. Physic nut IP-3A rejuvenated with grafting produced seeds 436.0 kg/ha at the first year, 3,434.5 kg/ha at the second year, and 1,409.1 kg/ha at the third year, and groundnut yields from first tothird year were 960.0 kg/ha, 913.6 kg/ha, and 1,233.3 kg/ha dry pods respectively. Physic nut IP-3A rejuvenated with pruning system produced seeds 529.8 kg/ha at the first year, 2,460.2 kg/ha at the second year, and 1,567.3 kg/ha at the third year and groundnut yields from first tothirdyear were 856.5 kg/ha, 300.46 kg/ha, and 533.30 kg/ha dry pods consecutively. Thus physic nut cultivation technologies are applied according to the conditions of existing plants. The use of recommended varieties best fit to agro-ecosystem is highly recommended by planting new plants or grafting. It is ideal to take up pruning activities when the plant is no longer productive.

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