[Asparagus (Asparagus officinalis L.) response to different irrigation regimes and nitrogen fertilization levels. Second year after planting]
1991
Contador F, Luis Felipe
An experiment was carried out applying different non-randomized amounts of water with randomized nitrogen fertilization treatments. The plant response to irrigation and nitrogen fertilization was evaluated by the characterization of the following parameters: fern dry matter; evapotranspiration; plant height; fern number and diameter per plant; root distribution; N, P, and K concentration in fern tips; N, P, K, Ca and Mg concentration and uptake in ferns; efficiency in the use of nitrogen fertilizer; and inorganic N concentration in soil profile. The irrigation effects were analyzed through lineal regression and it was noted, in general, a wide response of the measured variables to the amounts of water applied. The N applications showed significant differences in fern dry matter, N and K fern uptake, and N concentration in fern tips when water was applied in a range between 1000 and 1450 mm. The N concentration presented significant differences between 300 and 1450 mm of applied water. The estimation of the evapotranspiration of asparagus measuring moisture content in the soil profile before and after irrigation, did not show reliable results
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