Effects of Ratio of Row Spacing to Intrarow Spacing on Yield and Top Three Leaves of Super High-yielding Early and Late Rice

行/株距比对超高产早晚稻产量和上部三叶的影响(英文)

Using a split plot design, super high-yielding early rice ＆quot;Zhongjiazao 17＆quot;and ＆quot;Ganxin 203＆quot; and super high-yielding late rice ＆quot;Ganxin 688＆quot; and ＆quot;Wufengy-ouT025＆quot; were taken as materials with planting density the same at 312 000 hil s/hm2, to explore the effects of RS/IS （Ratio of row spacing to intrarow row spacing） on yield, top three leaves morphological features and its relationship of them in 2011 and 2012. The results showed that, whether early or late rice, biomass, accumula-tion and apparent utilizing rate of nitrogen were lower in RS/IS5.0 （40.0 cm ＆#215;8.0 cm） treatment, but yield of rice was higher in RS/IS2.0 （25.0 cm ＆#215;12.8 cm） treatment;grain numbers per spike of rice was more in RS/IS2.8 （30.0 cm＆#215;10.7 cm） treatment, and thousand-grain weight of rice was higher in RS/IS1.3 （20.0 cm＆#215;16.0 cm） treat-ment. For 4 varieties of early or late rice aforementioned, basal angle, opening an-gle and leaf area of 2nd leaf from top were larger in RS/IS5.0 treatment, and basal angle and opening angle were smal er in RS/IS2.0 treatment and leaf area smal er in RS/IS1.3 treatment.

于2011和2012年,采用裂区设计,以超高产早稻淦鑫203、中嘉早17和晚稻淦鑫688、五丰优T025为材料,在31.20万蔸/hm2密度下,研究了行/株距比(RS/IS)对超高产早晚稻产量和上部三叶形态特征的影响。结果表明,早晚稻四品种产量均以RS/IS2.0处理(25.0 cm×12.8 cm)较高,每穗粒数均以RS/IS2.8处理(30.0 cm×10.7 cm)较多,千粒重均以RS/IS1.3处理(20.0 cm×16.0 cm)较重,而生物产量、氮素积累总量和氮肥表观利用率均以RS/IS5.0处理(40.0 cm×8.0 cm)较低。早晚稻四品种的倒二叶基角和开张角以RS/IS5.0处理较大,以RS/IS2.0处理较小;倒二叶叶面积以RS/IS5.0处理较大,RS/IS1.3处理较小。