【摘要】 应用Richards模型研究了不同氮肥水平对水稻籽粒灌浆特性的影响,结果表明,不同处理的强、弱势粒灌浆特征均符合Richards模型;不同氮肥用量不仅影响籽粒灌浆的起始势、灌浆速率和灌浆时间等灌浆特征参数的大小,而且还影响强弱势粒之间灌浆特征参数的差异。强势粒生长终值量N120>N60>N90>N30>N0,弱势粒生长终值量N0>N120>N90>N60>N30;弱势粒灌浆时间均比相应的强势粒拉得长,无论强弱势粒,灌浆前期和盛期都占据灌浆过程的绝大部分时间,且各处理之间差异不明显。更多还原

【Abstract】 The effects of different nitrogen application rates on grain-filling properties of rice were studied with Richards’s growth model in this paper. The results were as followed: Superior and inferior grain filling of rice were all accordance with Richards Equation. Different nitrogen application rates not only havd effects on the grain-filling parameters, but also on the difference of grain-filling parameters between superior and inferior grain. Final value of superior grain was as followed:N120>N60>N90> N30>N0, and final value of inferior grain was N0>N120>N90>N60>N30. Filling period of IG was longer than one of SG. Whatever SG or IG, former and medium term occupied most of the time of filling.更多还原