Title: Effects of Nitrogen Supply on Growth and Nitrogen Nutrition of Chinese Onion
Abstract: In order to research the effects of nitrogen supply on the growth and nitrogen nutrition of Chinese onion,field trial with four nitrogen levels(0,210,280,420 kg/hm2)were conducted to investigate the accumulation of dry matter and nutrients uptake in different plant organs during the whole growth period of Chinese onion,and analyzed the synchronous regulation effect between the yield and quality.The results showed that the growth curve of Chinese onion was S-type.The growth of Chinese onion retarded for one month after field planting,named as seeding recovering stage and nearly without dry matter accumulation and nitrogen uptake.From August to October,the Chinese onion grew rapidly,and the monthly mean accumulations were 1.5 g per plant,3.2 g per plant and 6.4 g per plant respectively.The nitrogen absorption amounts were also increased and reached 23.7 kg/hm2,25.5 kg/hm2 and 35.7 kg/hm2 respectively.The nitrogen fertilizer could increase the dry matter accumulation and nitrogen absorption amounts significantly,with 21.1% and 12.1% increase by the end of harvest,respectively.Using nitrogen fertilizer could increase yield and benefit,but deficiency and excess supply of nitrogen also result in unbalance.Nitrogen fertilizer could increase the content of vitamin C in the edible parts of Chinese onion and decrease the content of soluble sugar.The yield,quality and economic benefit were the highest under the conditions of 280 kg/hm2 nitrogen fertilizztion.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 1
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