|Table of Contents|

Effects of Nitrogen Fertilizer Reduction on Photosynthetic Characteristics Yield and Quality of Greenhouse Pepper in Yellow Irrigation Area of Ningxia

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年07
Page:
1-9
Research Field:
Publishing date:

Info

Title:
Effects of Nitrogen Fertilizer Reduction on Photosynthetic Characteristics Yield and Quality of Greenhouse Pepper in Yellow Irrigation Area of Ningxia
Author(s):
GUO Xinnian1; JI Lidong1; YIN Zhirong1; LIANG Jinxiu1; SUN Quan2; ZHOU Tao1
(1.Institute of Agricultural Resources and Environment,Academy of Agriculture and Forestry Sciences of Ningxia,Yinchuan,Ningxia 750002;2.College of Agriculture,Ningxia University,Yinchuan,Ningxia 750021)
Keywords:
nitrogen reduction; greenhouse; pepper; growth; production quality; economic benefits
PACS:
-
DOI:
10.11937/bfyy.20192731
Abstract:
This study focused on the problem of excessive nitrogen use of greenhouse peppers in the Yellow Irrigation Area of Ningxia.Through field trials,‘Changjian 73’ was used as the experimental material,conventional fertilization(N 300.0 kg·hm-2),nitrogen reduction 10%(N 270.0 kg·hm-2),nitrogen reduction 20%(N 240.0 kg·hm-2),and nitrogen reduction 30%(N 210.0 kg·hm-2) were treated as part of this study,to clarify the effects of different treatments on the growth,photosynthetic characteristics,yield,quality,and economic benefits of pepper.The results showed that the 10% reduction in nitrogen fertilizer did not reduce the growth quality of pepper seedlings compared with conventional fertilization.Nitrogen reduction,plant height and stem thickness decreased during the key growth period.The highest treatment of SPAD was 10% reduction of nitrogen fertilizer during pepper fruit production period,1.6% increase compared with conventional nitrogen fertilizer.The crown size was 5.8% and 5.6% higher than those of normal nitrogen application during the flowering and fruit periods.The gas porosity,cellular CO2 concentration and photosynthetic rate of leaf were 9.4%,0.6% and 5.3% higher than those of conventional fertilizer treatment,during the pepper fruit season.Nitrogen reduction of 10% of pepper production increased by 1.1% compared to conventional nitrogen application,nitrogen reduction of 20% of pepper yield was slightly lower than conventional treatment,but the difference was not significant.Nitrogen fertilizer reduction reduced the nitrate content of pepper and increased the vitamin C content of pepper from 2.9%-8.8%.Nitrogen fertilizer reduction 10% treatment of income was 1.5% higher than conventional nitrogen fertilizer,and the highest yield ratio was 7.3.In terms of growth,photosynthetic characteristics,yield,quality and economic benefits of pepper,nitrogen fertilizer input,that is,not less than 240 kg·hm-2 and not more than 270 kg·hm-2,was a suitable nitrogen fertilizer reduction program and could be widely used in the region.

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Last Update: 2020-06-01