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近来人们在寻找使作物增产的新途径中,发现某些物理因素也可以使作物增产,因而把它们称之为“物理肥料”。色彩肥料:用蓝色薄膜覆盖水稻秧苗,成秧率比白色薄膜覆盖的要高4.2%,生育期要少2天;用红色的光线照射处于生长期的黄瓜和西红柿,可使成熟期提前1—1.5天;用黄色薄膜罩在芹菜上,则叶大茎粗;用银色薄膜罩在刚刚播种的菠菜籽上,4天后菠菜苗能长出4.5厘米以上;而不盖银色薄膜的菠菜4天后刚刚出芽。
Recently, looking for new ways to increase crop yields, we found that some of the physical factors can also increase crop yields and call them “physical fertilizers.” Color Fertilizer: Rice seedlings covered with a blue film, the seedling yield 4.2% higher than the white film coverage, growth period less 2 days; with red light irradiation in the growing season of cucumber and tomato, the maturity can advance 1 -1.5 days; the yellow film covered in celery, the leaves are large and thick; covered with a silver film in the just sown spinach seeds, 4 days after the spinach can grow more than 4.5 cm; spinach without silver film 4 days Just budding.