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无论是农业气候区划,还是考虑作物品种合理布局,或者是套、复种选取合理的作物组合,首先要考虑如何充分、合理利用热量资源。 热量年际间的变化很大,北方≥10℃积温高低相差700℃左右。想获得粮食高产、稳产困难是很多的。从农业气候角度上看,选取适当的积温保证率也是减轻低温冷害影响,充分、合理利用热量资源,获得高产、稳产的一个重要因素。
Regardless of the agricultural climate zoning, or consider the rational distribution of crop varieties, or sets, multiple crop selection reasonable crop combinations, we must first consider how to fully and rational use of heat resources. Changes in the heat between years, a large difference in the northern ≥10 ℃ accumulated temperature of about 700 ℃. Want to get high yield of grain, stable yield is a lot of difficulties. From an agricultural climate point of view, selecting the appropriate guaranteed rate of accumulated temperature is also an important factor in alleviating the effects of cold damage, fully and rationally using caloric resources, and obtaining high yields and stable yields.