摘要：Recording qualitative and quantitative traits of landraces is useful in maintaining genetic diversity. Landraces of sweet corn are grown for local markets in Khyber Pakhtunkhwa, province of Pakistan. This study was commenced to document changes in growth attributes of sweet corn under different micro-environments induced through altered planting dates. Four landraces {Mingora (MNG), Mansehra (MNS), Swabi (SWB) and Parachinar (PRC)} with cv. Azam (check) were planted on five dates at almost one month interval at New Developmental Farm University of Agriculture Peshawar, Pakistan. Randomized complete block (RCB) design with split plots was used. Planting dates and landraces alone or in combination significantly affected all parameters studied. Sweet corn attained maximum leaf area index, absolute growth rate (AGR) and crop growth rate (CGR) when planted in July during both years. Whereas, maximum plant height and plant dry weight were recorded in early plantings (April/March) during both years. Landrace SWB recorded maximum leaf area index, plant height, plant dry weight, absolute growth rate and crop growth rate in both years.
关键词：Sweet corn;maize;landraces;planting dates;leaf area index;crop growth
