Effects of nitrification inhibitors on nitrate content in soil and pakchoi and on pakchoi yield

Chinese Journal of Applied Ecology

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Effects of nitrification inhibitors on nitrate content in soil and pakchoi and on pakchoi yield

YU Guanghui^1,2;ZHANG Yangzhu¹;WAN Dajuan²

¹College of Resource and Environment,Hunan Agricultural University,Changsha 410128,China; ²School of Environment and Engineering,Zhongshan University,Guangzhou 510275,China

Received:2005-01-27 Revised:2005-08-21 Online:2006-02-18 Published:2006-02-18

Abstract

Abstract: A field experiment was conducted on two soil types in the Changsha suburb of Hunan Province to study the effects of hydroquinone (HQ),dicyandiamide (DCD) and thiourea (TU) on the nitrate content in soil and pakchoi and on the yield of pakchoi.The results showed that all the test nitrification inhibitors could significantly decrease the nitrate content in soil and pakchoi during whole growth stage,among which,DCD had the best effect,but the effect was differed on different soil types.Nitrification inhibitors could increase pakchoi yield,DCD was also the best one,and the effect was significantly better on vegetable garden red soil than on vegetable garden alluvial soil.The nitrate content in soil and pakchoi was the highest about 40 days after pakchoi transplanting.

Key words: Sacred groves, Yi nationality, Chuxiong, Biodiversity conservation

YU Guanghui^1,2;ZHANG Yangzhu¹;WAN Dajuan². Effects of nitrification inhibitors on nitrate content in soil and pakchoi and on pakchoi yield[J]. Chinese Journal of Applied Ecology.

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Effects of nitrification inhibitors on nitrate content in soil and pakchoi and on pakchoi yield

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