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为了研究气温对于紫草(Iithospermum erythrohizon)生长及紫草根萘醌色素产量的影响,日本科研人员进行了以下试验: 将紫草种子在3月份播下,长到3、4片叶子时移到小塑料盒内,长到11片叶子时(5厘米高)移到更大的盆内,盆内盛有土和堆肥的混合物。盆子分放在3个植物生长箱内,温度分别控制在白天/夜晚:28℃/25℃、28℃/20℃、28℃/15℃,湿度60％。另外,为了便于对照,在温室内也种了10株紫草。1个月后,在每只盆内加入1克微量元素。每天早晚各
In order to study the effect of temperature on the growth of Iithospermum erythrohizon and the pigment production of azadirachtin, Japanese researchers conducted the following experiment: the seeds of Lithospermum sowed in March and moved to small ones when they grew to 3,4 leaves Inside the plastic box, grow to 11 leaves (5 cm high) and move to a larger bowl containing a mixture of soil and compost. The pots were placed in three plant growth chambers and the temperature was controlled at day / night at 28 ° C / 25 ° C, 28 ° C / 20 ° C, 28 ° C / 15 ° C and 60% humidity respectively. In addition, for the sake of comparison, 10 species of comfrey were also planted in the greenhouse. After 1 month, add 1 gram of trace element to each bowl. Every morning and evening