Title: Study on soil nitrogen balance of spring maize continuous cropping in semi-arid area of Jilin Province.
Abstract:【Objective】 The study was done to guide nirtogen fertilization of spring maize in semi-arid area of west of Jilin Province.【Method】 Two-year field experiments in semi-arid area of west of Jilin provin...【Objective】 The study was done to guide nirtogen fertilization of spring maize in semi-arid area of west of Jilin Province.【Method】 Two-year field experiments in semi-arid area of west of Jilin province were carried out to study the effect of different fertilization modes on maize yield,nitrogen uptake and nitrogen efficiency.Meanwhile the soil nirtogen balance and translocation were also evaluated.【Result】 The results showed that single-dose application was influenced by annual rainfall amount,and the denitrification was subject to appear,yield and nitrogen efficiency were unstable.The basal fertilizer of traditional application was too high,which caused apparent decline of nitrogen utilization.The apparent residual rates of nitrogen fertilizer were up to 50 percents with single-dose application and traditional application.The residual nitrogen in soil layer from surface to 90 cm were 201 kg/hm2 and 278 kg/hm2,which was a potential threat to the safety of ground water.The yield biomass and nitrogen uptake were stable with fertilizer recommemdation treatment and nitrogen apparent recovery efficiency(REN),Physiological Use Efficiency(PEN),agronomic efficiency(AEN) and partial factor productivity(PFPN) were all high.After continuous double cropping,residual nitrogen in soil layer from surface to 90 cm was 128.5 kg/hm2,and a higher yield can be obtained under the condition of environmental-friendly.【Conclution】 Single-dose and traditional application result in high residual nitrogen in soil layer and increase nitrogen loss.Fertilizer recommemdation is reasonable.Read More
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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Cited By Count: 3
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