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在鄂湘七种旱地土壤的土培试验基础上，进行了土壤热水溶性硼（Hot-watersoluble-B，简称HWSB）、甘露醇硼（Mannitol-B）和盐酸羟胺硼（NH2OH·HCL-B）在油菜生长季节变化规律的研究。结果表明，从移栽前到油菜初蕾期到盛花期，随着生长季节的延伸，NPK处理的HWSB含量呈不断上升趋势，而NPK十B处理，则先明显下降，后稍许呈上升趋势；Mannitol-B在两处理上均呈不断上升趋势，NH2OH·HCI-B含量趋于稳定。在环境因素的作用下，三种硼的相互关系为；Mannitol-B与HWSB存在一定的相互转化关系；NH2OH·HCL-B和HWSB基本上是相同形态的硼，这是由供试土壤在多次盆栽后，土壤严重酸化，易还原性锰高度还原引起的。出于同一原因，Mannitol-B和NH2OH·HCI-B关系密切性较原土壤大大降低。
Based on the soil culture tests of seven dryland soils in Hubei and Hunan Provinces, hot-water soluble boron (HWSB), mannitol-B and hydroxylamine boron (NH2OH · HCL-B ) In rapeseed growing season change law research. The results showed that the content of HWSB in NPK increased with the growing season from the pre-transplanting stage to the early flowering stage of rapeseed. However, the NPK treatment tended to decrease at first and then to the latter at a slight increase. Mannitol-B showed a rising trend in both treatments, and the content of NH2OH · HCI-B tended to be stable. Under the action of environmental factors, the relationship between three kinds of boron is: Mannitol-B and HWSB have a certain mutual transformation relationship; NH2OH · HCL-B and HWSB are basically the same form of boron, After the second potted soil serious acidification, easy reduction of manganese caused by a high degree of reduction. For the same reason, the close relationship between Mannitol-B and NH2OH · HCI-B was significantly lower than that of the original soil.