Effect of growing media composition, compaction and periods of anoxia on the quality and keeping quality of potted roses (Rosa sp.)

2010 ◽  
Vol 126 (1) ◽  
pp. 56-63 ◽  
Author(s):  
Dorte Bodin Dresbøll
2013 ◽  
Vol 22 (3) ◽  
pp. 251 ◽  
Author(s):  
Syariful Mubarok ◽  
A Salimah ◽  
Farida Farida ◽  
Y Rochayat ◽  
Y Setiati

ABSTRAK. Pertumbuhan dan kualitas Aglaonema dipengaruhi oleh beberapa faktor di antaranya media tanam dan aktivitas hormonal. Penggunaan media tanaman alternatif selain pakis dan hormon seperti sitokinin penting untuk diketahui. Tujuan penelitian ialah untuk mengetahui pengaruh kombinasi tiga komposisi media tumbuh sebagai media alternatif serta pemberian sitokinin terhadap pertumbuhan dan kualitas  Aglaonema Fit Langsit. Penelitian dilakukan di Rumah Kaca Fakultas Pertanian Universitas Padjadjaran mulai Bulan Mei sampai dengan Agustus 2008. Komposisi media tanam yang digunakan yaitu arang sekam, cocopeat, dan zeolit dengan perbandingan (2:2:1), (3:2:1), (4:2:1), dan sebagai kontrol digunakan pakis, humus, pasir malang, dan cocopeat (2:1:1:1) yang dikombinasikan dengan pemberian sitokinin dengan konsentrasi 0, 50, dan 100 µl/l yang disemprotkan pada daun setiap 2 minggu sekali. Hasil percobaan menunjukkan bahwa kombinasi arang sekam, cocopeat, dan zeolit (3:2:1) disertai sitokinin 50 µl/l memberikan pengaruh yang lebih baik dibandingkan perlakuan lainnya dalam memperpanjang dan memperlebar ukuran daun, sehingga dapat meningkatkan kualitas tanaman Aglaonema menjadi lebih rimbun dan kompak karena semakin meningkatnya ukuran daun.<br /><br />ABSTRACT. Mubarok, S, Salimah, A, Farida, Rochayat, Y,  and Setiati, Y 2012. The Effect of Growing Media Compositions and Cytokinin Concentrations on the Growth of Aglaonema. The growth and quality of Aglaonema is affected by several factors such as growing media and hormones. The using of alternative growing media and hormones such as cytokinin are urgently needed to be identified. The aim of experiment was to find out the effect of the combination of three growing media composition as an alternative growing medium with cytokinin on the growth and quality of Aglaonema Fit Langsit. This experiment was conducted in Greenhouse at the Faculty of Agriculture, Padjadjaran University from May to August 2008. The compositions of growing media consisted of the mix of carbonated rice hulls, cocopeat, and zeolite at three combinations (2:2:1, 3:2:1, and 4:2:1) and a control consisted of the mix of fern, humus, malang sands, and cocopeat (2:1:1:1). They were combined with cytokinins of 0, 50, and 100 µl/l. The results showed that the composition of carbonated rice hulls, cocopeat, and zeolite (3:2:1) combined with 50 µl/l cytokinin gave a better result than other treatments in increasing leaves length and leaves width, so it increases the quality of Aglaonema become more dense and compact due to by increasing the leaf size. <br />


1959 ◽  
Vol 16 (6) ◽  
pp. 791-794 ◽  
Author(s):  
R. H. Moyer ◽  
B. A. Southcott ◽  
E. G. Baker ◽  
H. L. A. Tarr

Pacific coast dogfish (Squalus suckleyi) were held 21 days in ice and in refrigerated sea water with and without added chlortetracycline, viable bacterial counts and volatile bases being determined periodically. Viable bacteria increased sharply after about 14 days but the muscle pH values showed little or no increase. No appreciable increase in the total volatile base or trimethylamine content of the muscle was noted until the fish were stored for more than 2 weeks, and then the increases observed were comparatively small.


Sugar Tech ◽  
2012 ◽  
Vol 15 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Dilip Kumar ◽  
Jarnail Singh ◽  
D. R. Rai ◽  
Mahesh Kumar ◽  
S. Bhatia

1958 ◽  
Vol 25 (1) ◽  
pp. 32-51 ◽  
Author(s):  
Peggy B. Taylor ◽  
L. F. L. Clegg

The determination of apparent lactic acid has been used as a basis for a rejection test for raw milk. The method consists of precipitation of milk proteins with barium chloride, sodium hydroxide and zinc sulphate, and the addition of ferric chloride to the filtrate to produce the yellow colour of ferric lactate. Lactic acid is not solely responsible for the production of the yellow colour, which, nevertheless, gives a good relationship with keeping quality of milk (measured as hours to the C.O.B. end-point at 22° C.) and the values have been expressed as ‘apparent lactic acid’.The relationship of winter and summer milks to keeping quality has been studied, and a value of 0·03% apparent lactic acid in milk is equivalent to an average keeping quality of 5¾ and 8½ hr. for winter and summer milks, respectively. A value of 0·03% is recommended as the earliest value of apparent lactic acid at which milk could be rejected.The apparent lactic acid in colostrum and late-lactation milk and in milk from cows suffering from mastitis has been determined, and only in late-lactation milk were the values found to be significantly higher than usual in fresh raw milk, and an inverse relationship between yield and apparent lactic acid is suggested.Permanent glass matching disks have been prepared for use in a Lovibond comparator. This permits the intensity of the yellow colour produced with 1% ferric chloride to be determined and the apparent lactic acid in milk estimated.Grateful acknowledgement is made to the management and staff of the Dairy Department of the Reading Co-operative Society and the Farmer's Clean Milk Dairy, Reading, and local milk producers for supplying samples for experiments; to the N.M.T.S. staff in Reading for help in finding suitable farmers, and to the Dairy Husbandry Department of the N.I.R.D. for information about and samples of abnormal and late-lactation milk. Our particular thanks are due Miss Marie Gruber for technical assistance, to Dr N. J. Berridge for the suggestion and help on the work on pH change as an indication of keeping quality (given in the appendix), and to Dr A. T. R. Mattick for the advice given in this work.


2014 ◽  
Vol 7 (8) ◽  
pp. 2443-2450 ◽  
Author(s):  
Jeannine Bonilla ◽  
Maria Vargas ◽  
Lorena Atarés ◽  
Amparo Chiralt

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