一、产量的构成因素马铃薯的单位面积产量是由单株产量和每亩的株(穴)数构成的,可用下列关系表示:亩产量=亩株数×单株产量单株产量=平均薯块重×单株结薯数单株结薯数=单株主茎数×平均每茎结薯数平均茎块重=每株大中薯数×平均大中薯重在不同的栽培条件和采用不同品种时,其产量构成的主次要因素之间有所不同。在栽培水平较低的情况下,单株产量较低,常常依靠增加密度来提高单位面积产量;而增加密度的结果,单产虽有提高,但增产幅度不大,还会因群体的基础差使大、中薯率降低。在栽培条件较好的土地上,应注意充分 First, the composition of the yield factors Potato yield per unit area is produced by the number of plants and acre per plant (points) formed by the following relationship can be expressed as follows: Mu yield = number of trees × yield per plant yield = average tuber weight × tuber per plant tuber number per plant = the number of single main stem × tuber average number of stems per stem average weight per plant × tuber average number of large and medium tuber weight in different cultivation conditions and the use of different varieties , The production of the main factors constitute the difference between. In the case of lower cultivation level, the yield per plant is lower and the yield per unit area is often increased by increasing the density. As for the result of increasing the density, although the yield per unit area is increased, the rate of yield increase is small, , Potato in the lower rate. In the cultivation of better conditions on the land, should pay attention to full