Tread of potash enrichment and its effects on cotton at kordkoy soil in permanent plots
2005
Salahi Farahi, Mohammad | Qahri, Abd Ol-Qadir | Naderi, Davud
In order to evaluation of the effeets of idifferent potash treaments on soil available potassium valu, yield and and verticilium of cotton a experiment was coanducted at agricultural research station of during durung (19977-2002).The experimen was RCBD withseven potash potash treatments (0, 150, 300, 450 600, 750, 900)Kg K2o/ha in 0,tion is located in 5 Km of east of Gonbad. The altitutut of area is 45 meters above sea level and regard to (Xerothermo mediterranean climate).Before planting of rapseed wheat was planted crope. The experiment was carried out of factorial form in RCBD in 3replications. 3 irrigation (1-witout irrigation, 2-irrigation of flowering stage and 3-irrigation at flowering stage and seed filling stage) and 3 nitrogen treatments(1-witout applying of N,2-applying of N in soil out folliar application 3- applying of N in soil with foliar application)were the experiment treatments. P and K fertilizers were applied befor planting from triple super phosphate and potassium sulfate, The N required was applied in two split form (1/2 befor planting and ½ at flowering stage)as urea. The planting in oct in two years of experiment. Tha data analasis showed that the efect of irrigation, nitrigen and interaction of irrigation of nitrogen was significant on grainyield.the graine yield rapeseed in second year of experiment was more that of first year of experiment , because of the better weather condiation and the better distribution of percipitation of the area in second year of experiment. And therfore the effect of irrigation on graine yield was not significant on any of the estimated treats. The two years analysis showed that the effect of year was significant graine yield, the number of secondery branches and 1000 weight, that showes the varety of climatic conditions in two years of experiment.grain
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