Influence of soil moisture deficit and potassium fertilization on water relations and productivity of some sugarcane varieties
2011
Bekheet, M.A.
Two field experiments were carried out at Shandaweel Research Station, Sohag Governorate in 2008/2009 and 2009/2010 seasons to study the influence of twenty-seven treatments representing the combinations of three irrigation regimes (applying irrigation water at 75-80, 60-65 and 45-50% of field capacity), three potassium fertilization levels (48, 72 and 96 kg K2O/fed.) and three sugarcane varieties (the commercial, G.T.54-9 variety and two promising ones viz. Ph.8013 and G.84-47). A split-split plot design with three replications was used. The results showed that irrigating sugarcane at 60-65 % FC resulted in the tallest and thickest cane stalks, the highest number of millable canes and cane and sugar yields/fed., while the highest percentages of brix, sucrose and sugar recovery were recorded at 45-50 % FC. Water consumptive use (CU) was 8307.1 and 7621.4 m3/fed., when sugarcane was irrigated at 75-80% and 45-50% FC, respectively. The highest CU was recorded by Ph.8013, while the highest WUE was recorded by G. 84-47. Sugarcane G.84-47 variety showed significant superiority over the other ones in the number of millable canes, cane and sugar yields/fed as well as brix%, sucrose% and sugar recovery%. Raising K-fertilization level from 48 to 72 and 96 kg K2O/fed. led to a gradual increase in stalk height and diameter, number of millable canes, and cane and sugar yields/fed. as well as brix%, sucrose% and sugar recovery%. Under the conditions of the present investigation, planting G.84-47 sugarcane variety fertilized with 72 kg K2O/fed. and irrigated at 60-65% FC can be recommended to obtain the highest cane and sugar yields/fed.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Ain Shams University