摩尔达维亚农业生产的主要任务之一是最大限度地利用杂交的遗传优势,并尽可能获得可能达到的高产。 玉米就具有很大的高产潜力,例如,在国家的种子田中1973～1977年间玉米的平均产量为56.5公担/公顷。可是同一时期普通大田的产量仅仅只有34公担/公顷。 为了缩短可能产量和实际产量之间的差距,主要的技术措施之一就是施肥。根据气候、地区和土壤等不同条件,摩尔达维亚地区平均施肥量是氮肥60、磷肥60、钾肥30和氮肥90、磷肥90、钾肥60(公斤/公顷)。可使玉米产量增加5～15公担/公顷,如果施肥时不考虑上述特点就不会有好收成。 由于化肥数量有限,就必须在播种前少量施用,同时在苗期进行少量追肥,或将这两种施肥法结合起来施用。当化肥产量不高 One of the main tasks of Moldavia’s agricultural production is to maximize the genetic advantages of hybridization and maximize the possible high yields. For example, the average yield of maize from 1973 to 1977 in the country’s seed fields was 56.5 m³ / ha. However, the production of ordinary fields in the same period was only 34 km / ha. In order to shorten the gap between the potential output and the actual output, one of the main technical measures is fertilization. According to climate, regional and soil conditions, the average fertilization rate in Moldavia is 60, 60, 90 and 90, 60 (kg / ha). Corn yield can be increased by 5-15 hectares per hectare, if fertilization without considering the above characteristics will not have a good harvest. Due to the limited amount of fertilizers, it is necessary to apply a small amount before the planting, while carrying out a small amount of top dressing at the seedling stage or applying the two fertilizing methods in combination. When fertilizer production is not high