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 S 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 Urge scale production in field crops land in Shanxi province.
yam produced in Shanxi provincecultivationdensityyieldthe yam commodity
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万方数据
