应用同位素示踪技术研究ABT4号生根粉对水稻的增产机理  

USE OF ISOTOPIC TRACER TECHNIQUES TO RESEARCH MECHANISM OF RICE YIELD INCREASE AFTER APPLICATION OF ROOTING POWDER ABT-4

作　　者：吴惠民[1] 孙耀琛 金亚放[1] 

机构地区：[1]上海市农业科学院作物育种栽培研究所

出　　处：《上海农业学报》1994年第4期12-17,共6页Acta Agriculturae Shanghai

摘　　要：应用放射性核素３２Ｐ、１４Ｃ示踪技术，以水稻为研究对象采用不同浓度ＡＢＴ４号生根粉溶液浸种和喷施秧苗，测定秧苗根系吸收功能和叶片光合速率的动态变化，阐明ＡＢＴ４号生根粉的增产作用机理。研究结果表明，经ＡＢＴ４号５～２０ｍｇ·ｋｇ－１浓度浸种及栽前３ｄ秧苗叶面喷施处理，其根系吸收３２Ｐ的量比对照分别增加９９．５％和１１５．１％；孕穗、抽穗和灌浆期功能叶片的光合作用速率分别比对照提高８３％、４８％和５１％。从而进一步阐明了ＡＢＴ４号生根粉促进水稻新根生长、秧苗移栽后迅速活棵返青、调节地上地下部生长关系、增加物质积累、形成合理的产量结构，为在水稻栽培业中大面积推广应用ＡＢＴ４号生根粉提供了科学依据和合理的使用技术。ABT-4's influences on the function of root absorption and the dynamic changes of photosynthetic rate were studied at different concentrations of ABT-4 for seed soaking or foliage spray on rice sprouts by using radioactive nuclide 32P, 14 tracer techniques in order to elucide the function and mechanism of ABT-4 on rice yield increase. The results showed that when ABT-4 was used at concentrations of 5-20mg·kg-1 solution for seed soaking or foliage spray 3 days before transplanting, the root absorption in rice shoot increased by 99. 5% and 115. 1%, respectively, as compared with control, and the photosynthetic rate of functional leaves in booting, heading and filling periods increased by 83%, 48%, 51%, respectively, as compared with control. Meanwhile, at the concentrations of 5～20mg·kg-1, ABT-4 could obviously promote rice root absorption and photosynthesis by seed soaking or foliage spray. Consequently, application of ABT-4 can promote growth of new roots, rapid revival of seedlings from transplanting, regulation of the relation between aerial part and underground portion, increase of substance accumulation, formation of appropriate yield structure and increase in yield. All these results provide scientific basis and rational application techniques for the use of ABT-4 in rice cultivation.

关 键 词：水稻 同位素示踪技术 ABT4号 生根粉 光合速率 

分 类 号：S511.101[农业科学—作物学] S124.2