seeding amount and sowing density 播量和密度
sowing time density 播期密度
fixed density sowing 定距播种
Sowing at high density 高密度播种
sowing date and density 播期和密度
sowing time and density 播期和密度
Disease incidence related closely with not only varieties and meterological condition, but cultivation practices such as irrigation, sowing date, sowing density, sowing method and so on.
发病程度除与品种、气象条件有关外，还与灌水，播种时期，密度，播种方法等栽培措施关系密切。
The results indicated that plant height, leaf age, LAI and accumulation of dried matter existed difference under different sowing density, especially sowing densities had the great effects on yield.
结果表明，不同种植密度下株高、叶龄、LAI和干物质积累均存在差异，且产量受种植密度影响较大。
The suitable planting density and time of sowing are favor of optimum use of soil water and improving water use efficiency, and make potato increasing its output.
适宜播种密度和播期有利于土壤水分的优化利用和水分利用效率的提高，可促进旱地马铃薯增产。
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