Response of paclobutrazol application on some cotton varieties in paddy fields after rice | Respon pemberian paclobutrazol pada beberapa varietas kapas (Gossypium hirsutum L.) di lahan sawah sesudah padi
2011
Kadarwati F.T.
Cotton is a natural fibre crop for some textile raw material. The development of cotton is directed mainly to marginal lands, although few of it is planted in paddy fields after rice harvested. The productivity level of cotton fibre, is still low, about 0.8 to 1 ton per hectare. Effort to increase cotton production is done through the application of growth regulator aiming at enhancing to the growth of plant height, number of branches, number of flower, and boll. These components are fibre determinans. Research conducted at Sumberrejo Experimental garden, Bojonegoro from May to October 2010, in paddy fields after rice harvested. Factorial treatment arranged using randomized block design repeated four times. The first factor consisting of four cotton varieties: 1) Kanesia 8, 2) Kanesia 13, 3) Kanesia 15. The second factor is application of paclobutrazol by spraying the plants with usage of: a) 0, b) 1.50 l/ha given once at age 60 days, and c) 1.50 l/ha given twice at the age of 60 days and 75 days. The research showed that Kanesia 8 and Kanesia 13 varieties gave optimum vegetative and generative growth followed with Kanesia 13, Kanesia 14, and Kanesia 15. Paclobutrazol did not contribute significant effect on the growth of both vegetative and generative of cotton. The productivity of seed cotton of Kanesia 8 and Kanesia 13, 1,643 kg/ha and 1,686 kg/ha, respectively
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