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[1]SONG Qilong,YUE Shanchao,Cai Liqun.Response of Maize Root Morphology to Nitrogen Application Under Film Mulch[J].Research of Soil and Water Conservation,2020,27(02):23-29.

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Response of Maize Root Morphology to Nitrogen Application Under Film Mulch

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 02 Page number: 23-29 Column: Public date: 2020-03-30

Title:: Response of Maize Root Morphology to Nitrogen Application Under Film Mulch

Author(s):: SONG Qilong¹, YUE Shanchao², Cai Liqun^1,2; (1.College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China; 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China)

Keywords:: film mulch; nitrogen application; maize root

CLC:: S513; S143.1

DOI:: -

Abstract:: In order to study the effect of nitrogen application rate on root growth under film mulch conditions, field trials including no application of nitrogen, appropriate nitrogen application and excessive nitrogen application were carried out. The tested maize variety was Xianyu 335. The root system was obtained by 3D Monolith sampling method. The root index data were obtained by WinRHIZO Pro software analysis. The root growths under different nitrogen fertilizer rates were evaluated. The results showed that the main effect of nitrogen application rate on the root system under the mulch condition was found in the upper layer soil; there was a more developed root system in the upper layer with application of nitrogen, there were more fine roots, and the appropriate amount of nitrogen fertilizer significantly increased the dry weight of the total root, root length, root surface area and root volume of the corn, the increment rates were 86.1%, 35.22%, 62.2% and 113.1%, respectively, while the excess nitrogen fertilizer increased in the root slightly during the flowering stage, but still showed the inhibition on roots, the reduction rates of root dry weight, root length, root surface area and root volume of corn were 18.4%, 20.6%, 18.6% and 19.6%, respectively. The study suggests that the nitrogen fertilizer application rate 250 kg/hm² is suitable for root growth under film mulching condition. Excessive high nitrogen fertilizer input can significantly inhibit root growth and waste resources.

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Last Update: 2020-02-25