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据《园艺学报》2014年第10期《苹果园种植牧草对幼树生长及15N-尿素吸收、利用的影响》(作者彭玲等)报道,以两年生红富士/平邑甜茶为试材,采用田间小区试验及15N同位素标记示踪法,研究了低氮(50 kg·hm-2)和中氮(100 kg·hm-2)条件下分别种3种牧草(白三叶、黑麦草和鼠茅草)对苹果幼树生长及15N-尿素吸收、利用的影响。结果表明,春梢停长期,与单作苹果相比,种植牧草后苹果植株生物量吸氮量及15肥料利
According to “Horticulture Journal” No. 10, 2014 “apple orchard planting forage on young tree growth and 15N-urea absorption and utilization” (author Peng Ling, etc.) reported that two years of Fuji / Pingyi sweet tea as the test material, Field test and 15N isotope labeling tracing method were used to study the effects of three kinds of forage (white clover, ryegrass and white ryegrass) under low nitrogen (50 kg · hm-2) and medium nitrogen (100 kg · hm-2) Mouse grass) on young apple tree growth and 15N-urea absorption and utilization. The results showed that compared with single-cropping apples, the amount of nitrogen uptake by apples and 15%