柑桔树经多年结果后,缺素症越来越突出。过去我们以为多施肥可以复绿,但是结果并不理想。后来我们采取喷硼喷锰等措施,叶片只绿一时,不能从根本上改善缺素状况。近年来我们试行换泥(客土),头几年沿树冠滴水线挖深、宽均为30厘米的环 Citrus trees after many years of results, more and more prominent deficiency. In the past, we thought fertilization could be more green, but the result was not satisfactory. Later, we took such measures as spraying boron and spraying manganese, and the leaves were only green for a moment, which could not fundamentally improve the situation of lack of nutrients. In recent years, we try to change mud (guest soil), the first few years along the drip line to dig deep crown, a width of 30 cm ring