Effects of irrigation frequency and nitrogen fertilization on yield and nitrogen balance of Rhodes grass irrigated with municipal effluents

Kipnis, T.; Feigin, A.

Hassadeh 58(3): 541-549

1977


ISSN/ISBN: 0017-8314
Accession: 000361535

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Abstract
Rhodes grass grown in a grumusol soil at Zor'a, Israel was given 4 levels of N and irrigated with well water or municipal effluent (a) once or (b) twice/wk. Increasing the frequency of irrigation increased DM yields and N uptake and decreased N loss from the soil-plant system. DM yields, N uptake and N recovery were 1.8 t/1000 m2, 37 kg/1000 m2 and 57%, resp. for (a) and 2.1 t, 49 kg and 74%, resp. for (b). Denitrification appeared to be the main process responsible for disappearance of NO3-N from this soil and its leaching to soil depths below the reach of the crop. It is suggested that the management procedure in this trial greatly reduced soil NO3 accumulation and that irrigation with effluent was suitable for Rhodes grass.