Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (6): 1076-1083.DOI: 10.3969/j.issn.1000-2561.2020.06.002

• Crop Culture and Nutrition, Genetic BreedingCrop Culture and Nutrition, Genetic Breeding • Previous Articles     Next Articles

Changes of Agronomic Traits, Yield and Soil Nutrient of Red Soil in Southern China under Different Nitrogen Application Rates

LIN Xiaobing,ZHOU Lijun,HUANG Shangshu,ZHONG Yijun,CHENG Yanhong,ZHANG Kun,SUN Yongming,WU Lin()   

  1. Red Soil Institute of Jiangxi Province / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330046, China
  • Received:2019-03-22 Revised:2019-10-22 Online:2020-06-25 Published:2020-07-30
  • Contact: WU Lin


To explore the changes of agronomic traits, yield and soil nutrient of peanut under different nitrogen application rates in dryland of red soil in southern China, a randomized block experiment was conducted in the field. Using high-nitrogen fertilizer as the material, eight treatments including no nitrogen fertilizer (N0), 200% nitrogen application rate (N200%), 150% nitrogen application rate (N150%), 100% nitrogen application rate (N100%), 80% nitrogen application rate (N80%), 60% nitrogen application rate (N60%), 40% nitrogen application rate (N40%) and 20% nitrogen application rate (N20%) were set. The results showed that compared with N0, the application of nitrogen fertilizer could increase the yield of peanut pods, and the yield increase of peanut pods was 12.94%-24.62%. Pods yield, pods weight per plant and plump rate of peanut increased with the increase of nitrogen application rate. Branch number per plant and 100-kernel weight did not change significantly with nitrogen application rates. Plant height and 100-pod weight were the best in N80%. The soil alkaline nitrogen increased with the increase of nitrogen application rate. Correlation analysis showed that there was a significant positive correlation between pods yield of peanuts and plump rate, organic matter, alkaline nitrogen. There was a significant positive correlation between soil alkaline nitrogen and plump rate, organic matter, but a significant negative correlation with pH. Principal component analysis showed that the first principal component trait, the yield factor, such as fruit yield, pods weight per plant and fruit weight had an important effect on peanut growth. Path analysis showed that the path-coefficient of 100-pod weight and plump rate was large, and the two traits should be emphasized in increasing the yield of peanut fruit. In summary, pod yield, plant height, pods weight per plant, 100-pod weight and 100-kernel weight of N80% were the best in peanut yield, agronomic traits and cost.

Key words: nitrogen fertilizer, peanut, agronomic traits, pods yield, soil nutrient

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