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据市农科院土肥研究所分析表明:上海市郊区土壤中全硼平均含量为52ppm,低于全国土壤中全硼含量的平均数64ppm:有效硼的平均含量最低的土壤是尖沙泥,沟于泥、青紫泥等,变化在0.57～0.60ppm范围内;含量较高的土壤是黄泥头达0.75ppm:含量最高的是盐土,达0.82ppm。硼素营养与油菜的生殖过程有着十分密切的关系。当土壤严重缺硼,可给态硼含量低于0.3ppm,油菜植株硼素营养极度不良时,即会引起油菜的“花而不实”。在缺硼的油菜田采用根外喷施硼肥的措施,一般都能获得明显的增产效果。市郊金山、松江、上海、青浦及崇明等县的土壤,以青紫泥、沟
According to the analysis by the Institute of Soil and Fertilizer of the Academy of Agricultural Sciences, the average content of total boron in the soil in the suburbs of Shanghai is 52ppm, which is lower than the average of 64ppm in the whole country. The lowest average content of available boron is the soil with sharp sand and ditch In the mud, blue purple, etc., changes in the range of 0.57 ~ 0.60ppm; high content of soil is yellow muddy reached 0.75ppm: the highest content of salt, up to 0.82ppm. Boron nutrition and rape reproductive process has a very close relationship. When the soil is severely boron-deficient, boron content of less than 0.3ppm can be given to the state. When the rape plant boron nutrition is extremely poor, it will cause rape’s “flower and not real.” Boron in boron-deficient rape fields with the application of boron fertilizer measures, in general, can be significantly increased yield. Suburban Jinshan, Songjiang, Shanghai, Qingpu and Chongming County and other soil to purple purple soil, ditch