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答:水稻一生中所积累的干物质约有90%来源于叶片的光合产物,可通过水稻全生育期太阳辐射能量估算水稻产量潜力。根据袁隆平院士的估算,认为光能利用率在2.5%时,早稻每667平方米稻谷产量可达1000公斤,晚稻每667平方米稻谷产量可达1133公斤,中稻每667平方米稻谷产量可达1467公斤
A: About 90% of dry matter accumulated during rice’s life comes from photosynthetic products of the leaves. The potential of rice yield can be estimated from the solar radiation energy during the whole growth period of rice. According to the estimation of Yuan Longping academician, when the light energy utilization rate is 2.5%, the output of paddy per 667m2 will reach 1000kg for early rice, 1133kg for 667m2 for late rice, and 1467m2 for 667m2 for middle rice kg