The hphr not only has a larger sink but also possesses normal grain - filling , sink - filling , high seed - setting percentage and heavier panicles 重穗型组合杂交稻不仅库容大，而且籽粒充实率、充实程度良好，结实率正常。
A comparison of yield and its components between hybrid rice and conventional rice varieties was made with different seedling quantity and row spacing at transplanting 摘要比较了在不同插秧量和行距配置方式下杂交稻和常规稻的产量及其构成因素。
The absorbing amount of vigorous spikelets was 10 times higher than that of the weak spikelets , especially in hybrid rice combinations 杂交稻及其恢复系在物质分配方面表现出强势粒对弱势粒的粒间顶端优势，杂交组合比相应恢复系的粒间顶端优势表现更为明显。
It was also observed that the “ inter - grain apical dominance ” in hybrid rice was stronger than its restorer , which might be one of the main reasons for low seed setting in hybrid rice combination 强势粒对弱势粒物质摄取能力的优势，可能是杂交稻籽粒结实率低下的重要原因之一。
The comparison on the variety extension between inbred rice and hybrid rice was done and some problems about rice variety extension , rice breeding and the development of seed industry were discussed 对常规稻与杂交稻品种推广情况作了比较，对水稻品种推广与水稻育种、种业发展等问题进行了讨论。
In china it is planted 3 million ha per year , of which hybrid rice is about one half . rice takes up as much as 90 % of their totle planting area in some province , like sichuan , jiangxi , 在我国，水稻年播种面积在3000万公顷以上，其中杂交稻的播种面积占到50左右，部分省市如四川、江西杂交稻占90以上。
The effects of oxygen supply in the rhizosphere on the eh ( oxidation reduction potential ) of soil and rice yield in planting troughs were studied , with the hybrid rice combination you 7954 as the material 摘要以杂交稻组合优7954为材料，研究根际供氧对稻田土壤的氧化还原电位及水稻产量和物质生产的影响。
With two high - yielding hybrid rice combinations shanyou 63 and liangyoupeijiu as cheek , 18 combinations with big panicle are chosen to study the relationships between yield components and yield 摘要以汕优63和两优培九作对照， 18个株叶形态较好的大穗型两系杂交稻组合作为试验材料，研究分析了产量构成因素与产量的关系。
Super hybrid rice has a great yield potential , however , how to make a full play of its yield potential and to further increase rice yield by means of he ratooning system is a new topic for the development of super hybrid rice 如何利用超级杂交稻+再生稻的种植方式，充分发挥超级杂交稻的高产潜力，进一步增加产量，是超级杂交稻发展中面临的新课题。
Under the high yield cultivating conditions , the characteristics related to source / sink strength and flux distribution of the two - line hybrid rice liangyoupeijiu were studied as well as two controls shanyou 63 and peiliangyou 288 and the parents of all of them 摘要在高产栽培条件下，以汕优63和培两优288为对照，研究了杂交稻两优培九产量形成的源库流特性。
