摘要
Abstract
Objective] The aim was to determine the reasonable nitrogen application amount on citrus.[Method] With Newhall navel orange as the tested variety, setting up 4 treatments namely no nitrogen fertilizer ( CK), nitrogen application amount of 0.315, 0.450, 0.585 kg/plant, the agronomic traits, yield, fruit commodity, economic benefit of citrus under various nitrogen application quantities were studied. [ Result] The nitrogen fertilizer could enhance agronomic traits, increase average fruit number per plant, average single fruit weight, fruit lon-gitudinal diameter and transverse diameter by 44.6-66.2 fruits, 13.7-27.3 g, 1.9-3.7 mm, 2.9-4.0 mm, respectively;increase the yield of citrus by the growth rate of 21.94%-57.99%; weight of top grade fruit and first grade fruit was significantly increased by amplification of 14.93%-27.62% and 38.91%-42.58%; fruit quality and economic benefits were declined with increasing of nitrogen application amount. [Conclusion] Considering agronomic characters, yield, commodity and economic benefit of citrus, the appropriate nitrogen application quanti-ty is 0.450 kg/plant.关键词
柑橘/氮肥/产量/品质Key words
Citrus/Nitrogen fertilizer/Yield/Quality分类
农业科技
