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| Characteristics of dry matter accumulation and transportation in heavy panicle hybrid rice |
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| DOI：10.16768/j.issn.1004-874X.2017.08.001 |
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| Abstract: |
| To study the matter accumulation and transportation characteristics of heavy panicle hybrid rice，
taking Gangyou 188，Feiyou 188，Rong18you188，Jinyou 188，Fuyi188，Chuanlvyou188 and Chengfengyou 188
widely used in the production of all Lehui 188 series of heavy panicle rice varieties as the object，and taking Ⅱ
you 838 as the control，studing the relationship between dry matter accumulation，transport and yield of heavy
panicle rice varieties. The results showed that there were significant differences in yield characters and substance
accumulation among Lehui 188 series of varieties. The yield of the series combination was significantly higher than
that of control varieties（ combination of the average yield reached 10.39 t/hm2，increased by 13.44%），the reason
for yield increase mainly in the series combination of big panicle（ the average panicle length 25.33 cm，average
panicle 205.80 grains / panicle）. Accumulation of dry matter in vegetative organs at different growth stages and the
dry matter quality of panicle after heading of Lehui 188 series varieties was significantly higher than that of CK（At
booting stage，the dry matter accumulation in vegetative organs increased by 31.40%，14.11%，23.52% and 14.79%
compared with CK，respectively. The dry weight of panicle and mature stage increased by 38.31% and 19.38%，
respectively，compared with CK.）. The accumulation of matter in vegetative growth stage was positively correlated with the yield of this series. The main factor affecting the yield of Lehui 188 series heavy panicle rice varieties is grain
weight at grain filling stage. Therefore，in the production，it should not only pay attention to the field management
in the early stage，but also strengthen the management of water and fertilizer in the later period to ensure adequate
grouting. |
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