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Ningxia University (2020)

Study on Nitrogen Uptake and Utilization of Potato-Oat Intercropping System in Ningxia Semi-Arid Region

蔡明

Titre : Study on Nitrogen Uptake and Utilization of Potato-Oat Intercropping System in Ningxia Semi-Arid Region

Auteur : 蔡明

Grade : Master’s Theses 2020

Université : Ningxia University

Résumé partiel
In order to investigate the effect of intercropping and nitrogen application on the nitrogen uptake,accumulation,and transport,yield and quality of potato and oat in semi-arid regions of Ningxia.The ’Qing shu No 9’ and ’Yan ke No 1’ were used as research materials.The effects of planting pattern and nitrogen application level on the growth and development of potato and oat,nitrogen uptake,accumulation and transport in plants,nitrogen content in different forms of soils,soil physical and chemical properties,activity of protective enzyme,yield and quality were studied.The research results are as follows:1.Intercropping,nitrogen application and interaction can promote the growth of potato and oat.Intercropping with 150 kg·hm-2 performe best two years.In the early growth period of potato and oat,the average plant height and stem thickness of intercropping increased by 46.52%~62.01%,8.13%~23.57%,56.90%.90.50%,28.40~43.31%.Intercropping and nitrogen application can effectively promote potato leaf area index and dry matter accumulation,the best dry matter accumulation parameter was 150 kg·hm·2 intercropping.The effect of nitrogen application was better than intercropping for potato growth.2.In the early stage,intercropping and nitrogen application can resist the external adversity by improving the protective enzyme activity of potato and oat,the activity of protective enzyme of intercropping was lower than monocropping.With the growth and development,the relative chlorophyll content,malondialdehyde content and proline content of potato increased first and then decreased and nitrogen application of 150 kg·hm-2 and 225 kg·hm-2 was the best.In the early stage of potato growth and the later stage of oats growth,planting pattern and interaction had significant effect on the protective enzyme.The content of malondialdehyde and proline of oats reached the maximum at maturity,and the activity of catalase increased first and then decreased,reached the maximum at filling stage.The activity of peroxidase of oats decreased first and then increased,the activity of peroxidase was the lowest at heading stage

Mots clés : Potato ;Oat;Intercropping ;Nitrogen application ;15N;Yield ;

Présentation (CNKI)

Page publiée le 1er avril 2022