洋葱的吸肥规律

CHARACTERISTICS OF ABSORBING NUTRIENTS OF COMMON ONION

本文针对洋葱的生育特性和吸收养分特点,研究其吸肥规律,结果表明:①N、P、K、Ca、Mg、Mn、Fe等营养元素与其株高、茎高、茎粗、叶数、全株重、鳞茎直径和产量都有直接关系,均达显著和极显著水平。②洋葱一生有两个吸肥高峰,一为3月初茎叶生长和鳞茎初步形成期;二为4月底5月初鳞茎膨大期。本研究结果对于洋葱合理施肥,提高效益,增加鳞茎产量和改善品质都有着十分重要的意义。

Characteristics of absorbing nutrients of common onion were studied. The results obtained have shown that nutrition elements such as N, P, K, Ca, Mg, Mn and Fe have direct relationship with the growth-reproduction indices of common onion plant height, stem height, stem thickness, leaf number, whole plant weight, onion bulb diameter and yield, respectively, The correlation coefficients between them are significant at the levels of 1％ and 5％.The studies have shown that there are two peaks of absorbing nutrients during the whole growing period of common onion.The first peak comes out at the growing stage of stem and leaf and at the early formation stage of onion bulb about in early March and the second peak at the inflating stage of onion bulb from late April to early May. The studies of the characteristics of absorbing nutrients of common onion are of great importance to apply fertilizer rationally, increase yield and improve quality.