[Effects of fertilization on cotton growth and nitrogen use efficiency under salinity stress].
Cotton (Gossypium hirsutum) was raised at different salinity levels (0, 0.15% and 0.30%) by irrigating with fresh- or sea-water. The effects of fertilization (N, NK, NP and NPK) on plant growth, nitrogen (N) uptake and N use efficiency were studied. The results showed that salinity and fertilization both affected the biomass, agronomic N use efficiency, N bioavailability and nitrogen accumulation of plants, and significant interaction was observed between the two factors. Fertilization could improve N use efficiency and nitrogen accumulation of plants under salinity stress, and significantly promoted the cotton yield. Among the fertilization treatments, N combined with P and K had the best effect. The benefit of fertilization was better under low salinity (0.15%) than under moderate salinity (0.3%).
Jian-Long
JL
Dai
He-Quan
HQ
Lu
Zhen-Huai
ZH
Li
Liu-Sheng
LS
Duan
He-Zhong
HZ
Dong
D057914:Agricultural Irrigation; D018533:Biomass; D005308:Fertilizers; D003368:Gossypium / Q000254:growth & development*; D009584:Nitrogen / Q000737:chemistry*; D054712:Salinity; D012987:Soil / Q000737:chemistry; D013312:Stress, Physiological
D005308:Fertilizers; D012987:Soil; D009584:Nitrogen