密度、施肥、单株有效穗对蓖麻产量的效应

Effect of plant density,fertilizer and the number of effective spikes per plant on yield of Castor(Ricinum comununis L.)

采用3因素3水平的正交试验L9（3^4），研究了种植密度、施肥量、单株有效穗保留数量对蓖麻新品系6052产量的影响。结果表明：种植密度、施肥量对蓖麻产量的影响均达到极显著水平，单株有效穗保留数量对蓖麻产量无显著影响。最佳栽培技术方案：种植密度12495穴／hm^2，行塘距为1．0m×0．8m；施底肥钙镁磷肥375kg／hm^2，并在植株有6—8片真叶及主穗现蕾时,各追施尿素75kg／hm^2；单株有效穗数保留6穗。

Effects of plant density, fertilizer and the number of effective spikes per plant on yield of castor variety 6052 was studied by orthogonal experiment design of L9 （ 34 ）. The results showed plant density, fertilizer had significant effects on yield of castor seed, while the number of effective spikes per plant had no significant influence on yield of castor seed. It was concluded that the highest yield could be obtained by the density of 1.0m × 0.8 meter （12 495 individual plant/hm^2） , with 375kg/hm^2 calcium magnesium phosphate as base fertilizer, 75kg/hm^2 urea as topdressing at appearing 6 - 8 leaf and at bud emerging stage separately, and 6 effective spike per plant.