EFFECT OF COMPOST, COMPOST TEA AND HUMIC SUBSTANCES ENRICHED WITH K OR ZN ON RICE YIELD AND NET RETURN UNDER NITROGEN FORMS AND LEVELS | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 10, Volume 4, Issue 3, March 2013, Page 245-257 PDF (387.15 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2013.51756 | ||||
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| Author | ||||
| R. H. Atia | ||||
| Soils, Water and Environment Res. Inst. Agric. Res. Center, Giza, Egypt | ||||
| Abstract | ||||
| Two field experiments were carried out at Sakha Agricultural Research Station farm, Kafr El-Sheikh Governorate, Egypt (31o05' N latitude and 30o56' E longitude) during the two consecutive summer seasons of 2010 and 2011 using rice (Oryza sativa L.) grains variety (Sakha,101) to study the effect of compost, compost tea and humic substances enriched with potassium or zinc elements under nitrogen forms and levels on rice yield. Split-split plot design was used with four replicates. The main plots were assigned to two nitrogen forms: anhydrous ammonia 82% N (AA) and urea 46.5% N (U). The sub-plots were assigned to three nitrogen levels (30 (N30), 45 (N45), 60 (N60) kg N/ fed.) (fed.= 0.42 ha.). The sub sub-plots were randomly assigned to six treatments (1- control, 2- K-fulvate, 3- compost tea, 4- humic acid, 5- compost, 6- Zn-fulvate). The plot area was 3.5 x 4 = 14 m2. Field preparation and nursery practices were performed according to the traditional local management. The results can be summarized as following: 1-No significant differences in grain or straw yield were detected between the two N forms. 2-The values of grain, straw and biological yields increased significantly as N levels increased from N30 to N45 and N60 on average of the two seasons. 3-The treatment of Zn-fulvate significantly increased grain, straw and biological yields on average of the two seasons. 4-The highest grain yield values (4902 kg/fed and 4899 kg/fed.) were obtained under N60 level. of AA or U fertilizers combined with Zn–fulvate. 5-The highest value of biological yield (12040 kg/fed.) was recorded with Zn-fulvate under AA fertilizer at N60 level. 6-The highest gross return values ( 9804 and 9798 L.E./ fed.) and net return values ( 9554 and 9563 L.E./ fed.) of AA and U fertilizers were obtained at N60 level with Zn-fulvate treatment. 7-The highest increase of net return over control value for AA (1884 L.E./ fed.) was recorded with Zn-fulvate and N45 level, while the highest one for U fertilizer (1232 L.E./ fed.) was obtained as Zn-fulvate used with N60 level. | ||||
| Keywords | ||||
| Nitrogen forms and levels; K-fulvate; compost tea; Humic substances; compost; Zn–fulvate; net return of rice | ||||
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