编辑同志: 我们连今年春天开垦了一片荒地,种植五亩苗圃,是用插条方法种植的,前一个月发芽整齐,树苗长得很好,我们给它施了化肥,松土浇水没有耽误过,但当长到五个公分高时,树苗普遍出现发黄现象,看到小白杨树有死亡的可能,所以很心痛,请教几名技术员也没有办法,在这时,我们想到农垦科技,请你们给予解答防止死亡的办法,介绍用什么药能挽救发黄的白杨树苗? Editor’s Comrade: We even reclaimed a wasteland this spring. We planted five mu of nurseries planted with cuttings. The sprouting and tidying of the previous month gave us good seedlings. We applied fertilizers to it and did not delay watering However, when it grows to a height of five centimeters, the saplings are generally yellowed. It is very sad to see the death of the poplar trees. There are no other ways to consult a few technicians. At this moment, we think of Nongken Science and Technology , Please give you a solution to prevent death, introduce what medicine can save the yellow poplar seedlings?