【摘要】 土壤对水稻生长的有效态锌高低为EXC—Zn>OM—Zn>R₂O₃—Zn。水稻吸收的锌97%来自土壤。施入锌的铯大部份转变为土壤各形态锌,其分布为RES—Zn>CA—Zn>R₂O₃—Zn>OM—Zn>EXC—Zn。种植水稻促进了土壤锌向RES—Zn转化,从而使土壤锌和施入的水溶态锌有效性降低。其转化主要受土壤有机质嫌气分解和水稻根系呼吸及分泌作用的制约,并与土壤基本性质密切相关。更多还原

【Abstract】 To rice growth the availability to order of different forms of soil-Zn is EXC-Zn>OM-Zn>R₂O₃-Zn. The amount of 97% of zinc absorbed by rice mainly come from soils. Fertilizer-Zn mainly transforms into different forms of zinc components. Its contribution order is RES-Zn>CA-Zn>R₂O₃-Zn>OM-Zn>EXC-Zn under tuder the cultivativationof rice. Rice cultivation can promote the soil-Zn and fertilizer-Zn transforming into soil RES-Zn and reducing their availability to crop. These processes are controlled by anaerobic decomposition of soil organic matter and respiration and excretion of rice roots, relating to soil proper-ties as well.更多还原