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沈阳市苏家屯区大沟公社,属半丘陵半平原区。1981年,由于他们做到适期早种,躲过干旱和高温,粮豆平均亩产1,146斤。 春季风大少雨,气温回升快,土壤水分急剧下降,常常形成春旱。他们在抓紧整地保墒的基础上,于4月上旬,当土壤温度稳定通过7℃以上时,开犁播种,下旬就种完地,躲过春旱,保证了全苗。 玉米拔节后,雌穗开始分化,茎叶生长迅速,叶面蒸腾增大,抽雄前半月正是雌穗小花小穗分化期,要求供给较多的水分和养分。但这个时期常出现于
Shenyang Sujiatun Dagou commune, a semi-hilly semi-plains area. In 1981, the average yield of grain beans was 1,146 kg, as they were able to get their crops planted early and avoid drought and heat. Spring and rainy days, the temperature rose quickly, a sharp decline in soil moisture, often form a spring drought. On the basis of grasping the soil moisture completely, in early April, when the soil temperature stabilized above 7 ℃, the plow was planted and sowed late in the spring to avoid the spring drought and ensure the whole plant. Corn jointing, the ear began to differentiate, rapid growth of stems and leaves, leaf transpiration increases, tasseled the first half of the ear is spikelet flower spikelets, require more water and nutrients supply. But this period often appears in