晋山药栽培密度试验

主要探讨山药在大田大面积生产时的合理栽培密度,包括合理的株距、行距。从通风透光的角度探讨了不同株距、行距对最终产量和商品性的影响。其中,商品性按等级分为4级,一级为直径8 cm以上,二级为直径6～8 cm,三级为直径4～6 cm,四级为直径4 cm以下。根据最终经济产量计算出各种密度下的光能利用率,最高为0.459%。从商品性而言,等级为二级的行距为80 cm,株距为20 cm的占26.9%;等级为三级的行距为80 cm,株距为20 cm的占73.9%;由此可见,行距为80 cm、株距为20 cm的栽培密度下,较大直径所占的百分率均为最高。表明行距为80 cm、株距为20 cm时产量最高,山药的商品性也最好,为晋山药大田大面积栽培的合理密度。

Test of Cultivation Density of Yam in Shanxi

This report mainly approached the reasonable planting density of yam,including reasonable line spacing and plant spacing,for large scale of production in field crops land and effect on yield and commodity from the angle of ventilation with different line and plant spacing.Commodity class is divided into four levels: Class A as the diameter over 8 cm;Class B as the diameter of 6～8 cm;Class C as the diameter of 4～6 cm;and Class D as the diameter of less than 4 cm.According to the final economic benefit,we calculated light energy utilization of the various densities,and the results showed the maximum was 0.459%.From the commodity,in Class B,percentage of row spacing of 80 cm and plant spacing of 20 cm was 26.9%,while in Class C row spacing of 80 cm and plant spacing of 20 cm,the percentage is 73.9%,both of which were the highest.Thus,the yield of row spacing of 80 cm and plant spacing of 20 cm were the highest,which was reasonable planting density of yam for large scale production in field crops land in Shanxi province.