PJB-2011-245
PHYSIOLOGICAL RESPONSE OF AUTUMN PLANTED SUGARCANE TO SOIL MOISTURE DEPLETION AND PLANTING GEOMETRY ON DIFFERENT SOILS UNDER ARID CONDITIONS
EJAZ AHMED KHAN1, ABDUL GAFFAR SAGOO2 AND GUL HASSAN3
Abstract
A field experiment was conducted on autumn planted sugarcane cv. HSF 240 at two locations, i.e., Research Area at Rakh Bibi Campus Gomal University, Dara Ismail Khan on Silty clay soil and Main Line Lower Land Reclamation Research Station, Chak No 37 TDA (Thal Development Authority) Bhakkar, Pakistan on sandy loam soil during 2003-04 and 2004-05. The experiment was laid out according to a randomized complete block design (RCBD) with a split plot arrangement having four replications. There were four available soil moisture depletion levels (ASMDL) including ASMDL1 -20%, ASMDL2 -40%, ASMDL3 - 60% and ASMDL4 -80%, which were kept in main plots and four planting patterns viz. G1 -60 cm, G2 -75 cm spaced single row planting patterns and G3 -30/90, G4 -30/120 cm spaced paired row strip planting pattern, assigned to the sub plots having net subplot size of 24 m2. Analysis of pooled data of both locations showed that Leaf area index (LAI), Leaf area duration (LAD), Crop growth rate (CGR) and Net assimilation rate (NAR) were significantly affected by ASMDL and were maximum at 40% ASMD level followed by 60%
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