Study of the height of soil cover effects and organic mater on the yield of Asparagus officinalis.
2011
Zarifi Niya, Naser | Pak Nezhad, A`li Reza | Karam Pur, Hushang | Pishdar Faradaneh, Mohammad
Asparagus cultivation in Iran is based on recommended methods in other countries regardless of climatic, soil texture and other edaphic conditions. Due to semi-heavy soils of the region and low humus and organic material content, the use of livestock manures is a necessity. Considering the growth activity of asparagus rhizomes in 10cm of soil depth, determining the most precise sowing depth of crowns is also important. An experiment was conducted to assess the effects of soil-stacking and livestock manure treatments on asparagus' edible stems yield using 15 treatments in 3 replications as a split-plot based on complete randomized blocks design, at Safiabad agricultural research center of Dezful in 2007-09 The main factor was soil-stacking height (crown sowing depth) as: 10, 20 and 30 cm; while the sub-factor was various amounts of degraded sheep manure as: 0, 15, 30, 45 and 60 t/ha. Traits included number of stems per plant, stem diameter, edible stems yield and protein percentage, were evaluated. Results of two years combined analysis showed that there was a significant difference among manure treatments and sowing depth in 5% level of probability. Two years results of mean comparison with Duncan's test showed that the highest edible stems yield of 3830 kg/ha was achieved in 60 t/ha sheep manure and the highest edible stems yield with 3638 t/ha was achieved of 30 centimeters sowing depth.
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