Abstract
The effects of replacing mineral-N fertilization partially by organic or bio-fertilization on growth and fruiting of Seewy date palms were studied during 2012, 2013 and 2014 seasons. The palms are grown in a private orchard at El-Dakhla oasis, New Valley, Egypt, where the texture of soil is sandy loam. Ammonium nitrate, farmyard manure and nitrobien were added as mineral, organic and bio-forms of N, respectively. The experiment was set up in a complete randomized block design with nine treatments and three replicates, one palm per each. The obtained results indicated that: - Fertilizing the palms with either two forms (mineral plus organic) or (organic plus bio-form), as well as, three forms (mineral, organic plus bio-form) considerably increased the leaf area and N, P & K contents of leaves compared to using mineral-N source only. Using three forms gave the highest values of these traits. - Using either two form or three forms of nitrogen fertilization increased the residually of N, P and K compared to use mineral-N source only. - The heaviest bunch weight was detected on the palms that fertilized with the three forms, contained the third of them. Moreover, using either two or three forms was accompanied with improving fruit quality in terms of increasing fruit weight, total soluble solids and sugar contents and decreasing the moisture percentage. So, it is concluded that Seewy date palm production can rely on organic and bio-fertilization as alternatives to mineral-N fertilization or at least rationalize its use in the production of organic palm dates as well as increasing soil fertility, the nutritional status and yield besides reducing environmental pollution that may occurr by excess of chemical fertilizers used.
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Claims 8
Claim · model-written summary
Combined nitrogen forms increased leaf area relative to mineral nitrogen alone.
Verbatim
e0“Fertilizing the palms with either two forms (mineral plus organic) or (organic plus bio-form), as well as, three forms (mineral, organic plus bio-form) considerably increased the leaf area and N, P & K contents of leaves compared to using mineral-N source only”
t0“Seewy Date Palms”
Claim · model-written summary
Combined nitrogen forms increased leaf N, P, and K contents relative to mineral nitrogen alone.
Verbatim
e0“Fertilizing the palms with either two forms (mineral plus organic) or (organic plus bio-form), as well as, three forms (mineral, organic plus bio-form) considerably increased the leaf area and N, P & K contents of leaves compared to using mineral-N source only”
t0“Seewy Date Palms”
Claim · model-written summary
Three nitrogen forms gave the highest leaf area and leaf nutrient values.
Verbatim
e0“Using three forms gave the highest values of these traits”
e1“the leaf area and N, P & K contents of leaves”
t0“Seewy Date Palms”
Claim · model-written summary
Two or three nitrogen forms increased residual soil N, P, and K relative to mineral nitrogen alone.
Verbatim
e0“Using either two form or three forms of nitrogen fertilization increased the residually of N, P and K compared to use mineral-N source only”
t0“Seewy Date Palms”
Claim · model-written summary
The three-form nitrogen treatment produced the heaviest bunches.
Verbatim
e0“The heaviest bunch weight was detected on the palms that fertilized with the three forms”
t0“Seewy Date Palms”
Claim · model-written summary
Two or three fertilizer forms increased fruit weight, soluble solids, and sugar contents.
Verbatim
e0“using either two or three forms was accompanied with improving fruit quality in terms of increasing fruit weight, total soluble solids and sugar contents”
t0“Seewy Date Palms”
Claim · model-written summary
Two or three fertilizer forms decreased fruit moisture percentage.
Verbatim
e0“using either two or three forms was accompanied with improving fruit quality in terms of increasing fruit weight, total soluble solids and sugar contents and decreasing the moisture percentage”
t0“Seewy Date Palms”
Claim · model-written summary
The authors recommend organic and bio-fertilization as alternatives to mineral nitrogen or to rationalize its use.
Verbatim
e0“Seewy date palm production can rely on organic and bio-fertilization as alternatives to mineral-N fertilization or at least rationalize its use”
t0“Seewy Date Palms”