摘要
营养液培养条件下研究缺硼反应不同的棉花品种苗期对B、P、K、Ca、Mg吸收和分配的差异。结果表明 ,缺硼显著抑制棉花对B、P、K、Mg的吸收 ,敏感品种 970 6受抑制程度更严重。同时 ,缺硼还影响这些元素在 2品种体内的分配 ,地下部分配比降低 ,地上部分配比增加 ,不敏感品种 970 2变化幅度更大。缺硼也抑制棉花对Ca的吸收 ,并影响其在植株各部位的分配 。
The differences of the uptake and distribution of B, P, K, Ca and Mg between two cotton cultivars responding differently to B deficiency were studied during seedling period in the solution culture. The experiments showed B deficiency inhibited the uptake of B, P, K, Mg in cotton, which was displayed more distinctly in the B inefficient cultivar than the B efficient one. Moreover, the distribution of these nutrients in cotton plant was affected by B deficiency, the nutrients' distribution rate in roots was reduced, raised in shoots, but the extent of change was larger in the B efficient cultivar. The results indicated the higher capability of nutrient uptake and transporting from roots to shoots was the main reason why the B efficient cultivar grew better than the B inefficient one under the condition of B deficiency. The Ca uptake and distribution was also affected by B deficiency, but there was not significant difference between both cotton cultivars.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2001年第2期134-137,共4页
Journal of Huazhong Agricultural University
基金
国家自然科学基金! (39870 5 2 0 )
国家教委博士点基金! (970 40 4)资助项目
关键词
棉花
品种
养分吸收
养分分配
缺硼胁迫
磷
钾
钙
镁
硼
cotton cultivars, boron efficiency, nutrient uptake, nutrient distribution
