通过大田试验，以深优9516为对照，研究了杂交水稻新品种Y两优087的干物质生产特性。结果表明，Y两优087的总干物质生产量比深优9516约高10%。具体来看，Y两优087灌浆盛期前的干物质积累量比深优9516高224.9 g /m2，而灌浆盛期后的干物质积累量却比深优9516低107.9 g/m2。Y两优087灌浆盛期前较高的干物质积累量与其叶面积指数和光合势较高有关，而其灌浆盛期后较低的干物质积累量则与其叶片衰老较快（表现为叶片氮含量下降快）有关。因此，在Y两优087栽培过程中，要注意采取防早衰措施。
[1] 肖应辉，余铁桥，陈立云，等. 两系亚种间杂交稻干物质生产特性的研究[J]. 湖南农业大学学报，1999，25（6）：425-429.
[2] Peng S，Cassman K G，Virmani S S，et al. Yield potential trends of tropical rice since the release of IR8 and the challenge of increasing rice yield potential [J]. Crop Sci，1999，39：1552-1559.
[3] Zhang Y，Tang Q，Zou Y，et al. Yield potential and radiation use efficiency of “super” hybrid rice grown under subtropical conditions [J]. Field Crop Res，2009，114：91-98.
[4] 李永青，邹永红，李伟荣，等. 两系杂交水稻新组合Y两优087的选育及应用[J]. 杂交水稻，2011，26（5）：14-17.
[5] Yoshida S，Coronel V. Nitrogen nutrition，leaf resistance，and leaf photosynthetic rate of the rice plant[J]. Soil Sci Plant Nutr，1976，22: 207-211.
[6] Makino A，Nakano H，Mae T. Responses of rubulose-1，5-bisphosphate carboxylase，Cytochromef，and sucrose synthesis enzymes in rice leaves to leaf nitrogen and their relationships to photosynthesis[J]. Plant Physiol，1994，105：173-179.
[7] Nakano H，Makino A，Mae T. The effect of elevated partial pressures of CO2 on the relationship between photosynthetic capacity and N content in rice leaves[J]. Plant Physiol，1997，115: 191-198.
