The root growth characteristics of broadcasted rice seedlings and the effects of broadcasting on plant growth were systematically studied under the treatments of upright seedlings with soil (USWS), leaning seedlings with soil (LESWS), lying seedlings with soil (LASWS), leaning seedlings without soil (LASWTS) and upright seedlings without soil (USWTS). USWS and LESWS recovered earlier with a smaller dead root ratio, and the length and the dry weight of roots were both higher than those of LASWS and LESWTS whose seedling standing speed was extremely and significantly correlated with the root growth. USWS and LESWS, chara`cterized by earlier tillering and higher productive tiller rates, maintained stronger root activity at later stages and optimum rootshoot ratio throughout the whole growth period, displaying significantly higher nitrogen absorption rates, leaf chlorophyll content and root depths than LASWS and LASWTS. Considering earlier standing and recovery, significantly better root growth and fairly stronger growth capacity of USWS and LESWS, it is reasonable to seek high yielding and super high yielding of broadcasted rice by means of increasing the rate of upright seedlings with soil, reducing lying seedlings and improving seedling standing by promoting root growth.
GUO Baowei1, ZHANG Chunhua1, CHEN Houcun2, ZHANG Hongcheng1,*, ZHOU Xingtao1, ZHANG Jun1,LI Jie1, CHEN Jingdu1, XU Ke1, WEI Haiyan1, DAI Qigen1, HUO Zhongyang1, XING Lin1, ZHU Congcong1
. Root Characteristics of Broadcasted Rice Seedlings During Seedling Standing and Its Effect on Plant Growth[J]. Chinese Journal OF Rice Science, 2011
, 25(6)
: 621
-628
.
DOI: 10.3969/j.issn.10017216.2011.06.009
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