Effect of nitrogen on the growth and yield of asparagus (asparagus officinalis)
2006
An experiment was conducted to study the effect of nitrogen i.e.0, 60, 90 and 120 kg ha-1 on the growth and yield of asparagus varieties Atlas, Grande, Purple Passion, Apollo, UC 157JI and Duke Verde at Horticultural Research Farm, Malakandher, NWFP Agricultural University, Peshawar during the years 2004 and 2005. The experiment was laid out as randomized complete block design with split plot arrangement with three replications. Variety Grande had significantly highest plant height (2.1m), number of spears crown-1 (35.5), spear length (24.1cm), spear weight (34.0g) and yield ha-1 (41.25t) and minimum of these were recorded in Duke Verde. In nitrogen levels, 90 kg N ha -1 gave maximum plant height (2.3m), number of branches plant-1 (12.2), plant weight (178.8g) and root weight plant-1 (288.3g), number of spears crown-1 (34.1), spear length (25.1cm), spear weight (32.2g) and yield ha-1 (37.9t) . In interaction between N levels and varieties, maximum number of spears crown-1(57.6), spear length (26.2cm), spear weight (36.7g) and yield ha -1 (70.4t) were recorded for variety Grande supplied with 90 kg N ha-1.
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