Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (12): 24-30.doi: 10.11924/j.issn.1000-6850.casb2020-0139

Special Issue: 油料作物

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Differences of Accumulation and Distribution of Nitrogen, Phosphorus and Potassium in Rapeseed Under Two Soil Salt Concentration Levels

Liu Jingyi(), Zuo Qingsong(), Wang Long, You Jingjing, Zheng Jingdong, Chen Jiaxuan, Yang Guang, Leng Suohu   

  1. Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou Jiangsu 225009
  • Received:2020-05-29 Revised:2020-11-05 Online:2021-04-25 Published:2021-05-13
  • Contact: Zuo Qingsong E-mail:Liuyzu539@163.com;qszuo@yzu.edu.cn

Abstract:

To study the effects of different salt concentrations on the accumulation and distribution of nitrogen (N), phosphorus (P) and potassium (K), three rapeseed varieties (Brassica napus L.) were cultivated under low salt concentration and high salt concentration, respectively. Dry matter was weighed and N, P and K contents were tested at maturity. Results show that with the increase of soil salt concentration, the dry matter accumulation of whole plant and different organs decrease significantly. The range of total N and P accumulation is 141.39-193.14 kg/hm2 and 21.95-36.24 kg/hm2, respectively. Among different organs, the average decreasing range of N and P accumulation in root are the largest, and the average decreasing range of K accumulation in grains is the largest. At maturity, nitrogen and phosphorus are mainly distributed in seeds, and the range of distribution proportion of N and P vary from 63.15% to 67.73% and 75.23% to 81.56% respectively. Potassium is mainly distributed in stems, and its variation is from 45.59% to 49.67%. Studying the agronomic characters and physiological indexes of rapeseed in different saline soil at maturity could clarify the influence mechanism of salt on rapeseed growth and nutrients absorption characteristics.

Key words: rapeseed, salt concentration, NPK, accumulation and distribution

CLC Number: