Effect of Times and Methods of Potassium Fertilizer on Yield and Yield Components of New Hybrid Cotton (giza 86 X 10229) Under Early and Late Sowing
Year: 2015
Type: article
Abstract: Two field experiments were carried out at Sakha AgriculturalResearch Station at Kafr El-Sheikh Governorate, Egypt, on new hybridcotton (Giza 86 X 10229) during 2013 and 2014 seasons to study theeffect of sowing dates (15 April and 15 May) as main plots and fivemethods and time of potassium sulphate application as sub plots i.e:1- Soil application of 24 kg K2O/fed. as potassium sulphate (48% K2O)after thinning.2- Soil application of 24 kg K2O/fed. as potassium sulphate (48% K2O) attwo weeks after thinning.3- Foliar application of 5 kg potassium sulphate (48% K2O)/fed. sprayedtwo times at the square and start flowering stages.4- Foliar application of 5 kg potassium sulphate (48% K2O)/fed. sprayedtwo times at the start and peak of flowering stages.5- Foliar application of 5 kg potassium sulphate (48% K2O)/fed. sprayedthree times at square, start and peak of flowering stages. The mostimportant results obtained could be summarized as follows:1) Results obtained revealed that early sowing (15 April) significantlyincreased no. of internodes and sympodia on the main stem, no. ofopen bolls/plant, boll weight, seed cotton yield/plant and /feddan, dryweight of vegetative and fruiting organs of plant, days to first flower,days to first open boll and earliness percentage, while plant height, no.of more monopodial/plant and first sympodium node were decreased.2) Results indicated the positive effect of potassium when it was appliedat the proper time as soil application at two weeks after thinning whichresulted in less no. of monopodia and higher no. of sympodia, higherdry weight of vegetative and fruiting organs, heaviest bolls, and higherno. of open bolls as well as seed cotton yield/plant and /feddan.Potassium fertilization showed no effect on no. of main steminternodes/plant, first sympodium node, days to first flower, days tofirst open boll, seed index, earliness percentage and lint percentage.3) The interaction of planting date by K treatments was not significant forall traits studied in this investigation.4) Generally, results obtained revealed that early sowing (15 April) andthe soil application of potassium sulphate (24 kg/feddan) fertilizer attwo weeks after thinning for obtaining high productivity of new hybridcotton (Giza 86 x 10229).
Institution: Agricultural Research Center
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W3198248761