摘要
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 a pot experiment conducted with seven upland soils collected from Hubei and Hunan Provinces, a research was made on the dynamics of hot-water soluble boron (HWSB), Mannitol-B and NH2OH. HCI-B during rape growing periods. The results showed that from before rape transplanting to flower-bud appearing, then to fully blooming, the content of HWSB in the treatment without boron had a tendency of constant increase, but that in the treatment with boron went up slightly after it had decreased obviously. And the content of Mannitol-B tended to keep increasing in both the treatments. At the same time, the content of NH2OH. HCl-B tended to be stable. The relationships among the three kinds of soil boron were that Mannitol-B and HWSB could transform with each other under the effect of environmental factors; NH2OH.HCI-B and HWSB were fundamentally the same boron fraction, which was due to that the soils were acidified and the Mn oxyhydroxides were reduced strongly after the several planting experiments. For the same reason, relationship between Mannitol-B and NH2OH. HCI-B in the experimental soils weakened compared to that in the primary soils.
出处
《土壤学报》
CAS
CSCD
北大核心
1998年第4期510-516,共7页
Acta Pedologica Sinica
基金
国家自然科学基金!39370415
关键词
土壤
硼
动态变化
环境因素
油菜生长
Extractable soil boron, Pot experiment dynamic Transformation,Environmental factor
