Effects of Virus-free Treatment on the Activities of Peroxidase and Nitrate Reductase and Nitrogen Metabolism in Apple Trees
Xiang Dianfang, Song Jinyao, Liu Yongjun, Zhang Deming, Chen Shuangying
ACTA AGRICULTURAE BOREALI-SINICA . 1995, (2): 82 -86 .  DOI: 10.3321/j.issn:1000-7091.1995.02.016