Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (4): 664-669.DOI: 10.3969/j.issn.1000-2561.2019.04.006

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

Effect of Silicate on Banana Growth and Nitrogen Nutrition with Different Nitrogen Supply Level

WANG Lu,YANG Shuai,CHEN Yuzi,WANG Suiliang,CHANG Chunrong()   

  1. Institute of Tropical Agriculture and Forestry, Hainan Universtry, Haikou, Hainan 570228, China
  • Received:2018-09-01 Revised:2019-02-01 Online:2019-04-15 Published:2019-05-21
  • Contact: Chunrong CHANG

Abstract:

The effect of silicate (Si) on the growth and nitrogen (N) nutrition of three banana varieties with normal (200 mg/L) and higher (400 mg/L) nitrogen supply level through sand culture experiments was studied. The biomass of shoots and roots, root activity, concentration of nitrate, total nitrogen and silicon, and the distribution ratio in roots and shoots were changeable by adding silicon. The three banana varieties tested had different responding characteristic. N metabolism had interreaction with Si. Adding silicon increased or reduced markedly the change extent, but among two nitrogen supply levels the change trend had no significant difference. Root activity of ‘Brazil’ banana at normal, ‘Baodao’ and ‘Weiliansi’ banana at higher nitrogen supply level increased distinctly by 46.0%, 38.4% and 186% compared with the control treatment respectively after adding silicon. The ratio of total N concentration in roots to that in leaves of ‘Brazil’ banana reduced markedly after adding silicon, while the ratio of roots to that in pseudo stems of ‘Baodao’ and ‘Weiliansi’ banana at normal nitrogen supply level increased. Silicon concentration in leaves of three banana varieties tested increased by 17.6%-102.3% after adding silicon compared with the control treatment. By adding silicon the change of silicon concentration in roots and that in pseudo stems were related to N supply level and banana varieties respectively. In roots N concentration showed significant linear relationship with silicon concentration at higher nitrogen supply level with no silicon supply.

Key words: silicon, banana variety, nitrogen distribution, banana growth