Analysis of yield and utilization of temperature and light resources of different types of ra-toon rice varieties in central Anhui,China
To explore the growth and development characteristics and utilization of temperature and light resources a-mong different types of ratoon rice varieties in central Anhui,China,and provide references for the selection of suit-able ratoon rice varieties and annual rice cultivation patterns,8 representative ratoon rice varieties from 4 types(ear-ly indica rice,early indica hybrid rice,middle-season indica hybrid rice,indica-japonica hybrid rice)were selected as the test materials.The rice yield and meteorological factors were measured during the whole growth period.The results showed that the middle-season indica hybrid rice had the highest yield[(12.47±0.24)t·hm-2],solar radi-ation production efficiency[(0.40±0.01)g·MJ-1]and effective accumulated temperature(≥10℃)production efficiency[(4.35±0.10)kg·hm-2·℃-1·d-1].It realized high yield by maitaining the high daily yield and pro-longed growth period.Early indica rice and early indica hybrid rice matured 24-47 days earlier than the midle-sea-son indica hybrid rice and indica-japonica hybrid rice,which provided more abundant temperature and light resources for the successive crop planting.In summary,when the middle-season indica hybrid rice was used as ratoon rice,it could improve the utilization efficiency of temperature and light resources and crop yield.However,the rotation pat-terns could be more abundant when the early indica rice and early indica hybrid rice were used as ratoon rice.
ratoon ricevarietyyieldutilization of temperature and light resourcesrotation model
NETL
NSTL
万方数据
