南丰和衢州柑橘产区土壤及叶片硼含量状况分析

Analyzing boron contents in soil and leaf of citrus orchards in the Nanfeng and Quzhou

对南丰县126个柑橘园和衢州市51个柑橘园的土壤及叶片中的硼含量进行分析。结果发现:南丰县和衢州市的柑橘园土壤整体上缺硼严重,南丰县柑橘园土壤中硼含量的平均值仅为0.20 mg/kg,缺硼的比例高达98.4%;衢州市柑橘园土壤有效硼含量的平均值为0.24mg/kg,缺硼比例达96.1%。南丰县和衢州市柑橘园叶片硼缺乏并不明显,南丰县柑橘园叶片仅有12.70%表现出硼缺乏状态,其中,桑田镇柑橘园叶片硼含量平均值最低(77.41mg/kg),有20.00%的柑橘园叶片处在硼低量状态;衢州市柑橘园叶片缺硼较南丰县严重,有41.18%的柑橘园叶片处在低硼水平,叶片硼含量最低的是柯城区(20.67 mg/kg),缺硼比例达54.84%,其余近半数的柑橘园叶片硼含量处于适量和高量的水平。南丰县和衢州市大部分乡镇的柑橘园中土壤有效硼含量的高低与柑橘叶片硼含量的高低并无显著相关性,仅桑田镇、常山县、柯城区表现出负相关性。因此,应根据柑橘园土壤和树体硼营养状况,科学施用硼肥,宜采用土施结合叶面喷施的硼肥施用方式。

126samples of citrus orchards in Nanfeng and 51 samples from Quzhou were collected.Boron(B)contents in soil and leaf were investigated.Results showed that the soil in most regions of Nanfeng and Quzhou was in B deficiency.The average content of soil available B were 0.20 mg/kg in Nanfeng and 0.24mg/kg in Quzhou,where the proportion of B deficiency soil were accounted for 98.4%and 96.1%.There was no obvious B deficiency in citrus leaf of Nanfeng and Quzhou.Only 12.70% orchards of Nanfeng exhibited leaf B deficiency.Sangtian Town of Nanfeng had the lowest average leaf B concentration(77.41mg/kg),and there was 20.00% orchards in low level of leaf B concentration.The boron deficiency in citrus leaf of Quzhou was more serious than that in Nanfeng,and about 41.18% orchards of Quzhou existed leaf B deficiency.Leaf B concentration in Kecheng was the lowest(20.67mg/kg)in Quzhou and about 54.84%of orchards lack of B.There were near half of the citrus orchards in B optimum and high levels.There was no significant correlation between soil available B content and citrus leaves B concentration in most citrus orchards of Nanfeng and Quzhou.There was a negative correlation in the area of Sangtian,Changshan,and Kecheng.The B nutrition status of soil and tree should be defined before applying B fertilizer properly.Soil combined with leaf fertilization may be the better way to supply B fertilizer in citrus orchards.