不同育栽方式水稻籽粒灌浆结实与旗叶衰老特性研究

研究了肥床旱育手栽、半水育秧手栽及塑盘旱育抛栽水稻籽粒灌浆及旗叶衰老特征。结果表明：半水育秧手栽水稻籽粒活跃生长期长，但起始生长势弱，平均生长速率低、旗叶早期衰老慢，而后期快，肥床旱育手栽则相反，起始生长势和平均生长速率最高、活跃生长时期最短，旗叶前期衰老快后期慢，塑盘旱育抛栽介于两者之间。籽粒灌浆与旗叶衰老有较好的负相关。

Studies on the Characters of Grain Fillng and Flag Leaf Senescence of Rice Raised and Transplanted by Different Ways

The characters of grain filling and flag leaf senescence of rice raised and transplanted by different ways viz. dry-land raised and hand transplanted rice (DHR)?plastic plate raised and throwing rice (PTR) and wet-land raised and hand transplanted rice (WHR) were studied. WHR had the longest active growth day (D) , but it had the lowest mean growth rate ( G m) and initial growth potential ( R 0), flag leaf senescence rate and grain filling were slower in early days, faster in late days, respectively. DHR had the highest R 0 and G m and the shortest D , flag leaf senescence and grains filling were faster in early days, slower in late days, respectively. PTR grain filling parameters value and flag leaf senescence were always in the middle of the two others. There was a good negative correlation between grain filling and flag leaf senescence.