Effects of salinity and nitrogen on cotton growth in arid environment

Our study indicated that N uptake and the cotton yield were not affected by high N application rate, and the N uptake and the cotton yield increased as the soil salinity decreased

Weiping Chen; Zhenan Hou; Laosheng Wu; Yongchao Liang; Changzhou Wei

2009

Scholarcy highlights

  • Soil salinity adversely affects crop productivity and agricultural sustainability in many areas of the world, especially in arid and semi-arid regions
  • It is known that the growth inhibition and the adverse effects induced by salinity can be alleviated by proper use of fertilizer and water management, depending on plant species, salinity level, and environmental conditions
  • The average plant height decreased from 30.3 cm, to 19.7 cm, 13.8 cm and to 6.0 cm as the soil salinity level increased from 2.4 dS m−1 to 7.7 dS m−1, 12.5 dS m−1 and to 17.1 dS m−1, respectively
  • Our study indicated that N uptake and the cotton yield were not affected by high N application rate, and the N uptake and the cotton yield increased as the soil salinity decreased
  • At low soil salinity level, increasing the N application rate could significantly enhance the N uptake, alleviating the adverse effects causing by salinity
  • Dry mass of seed was reduced by 22%, 52%, and 84% respectively, when the soil salinity level increased
  • Under the high soil salinity, salt was the dominated factor governing the growth of cotton and N uptake

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