Analysis of the Border Effects on Growth and Yield of High Yielding Hybrid Rice

Plant height,dry matter production,yield and its components were analyzed under the border hills and central hills with high yielding hybrid rice,Xieyou9308,Liangyoupeijiu and II you 7954.The results showed that,compared with the central hills,yield,panicle number per hill and total grain number per panicle and fringe spikelet was increased by 93.8%,57.1%,19.2% and 3.5% respectively in Xieyou9308.The panicle number per hill and total grain number per panicle were increased by 64.4% and 14.1% respectively in II you 7954.The panicle number per hill and total grain number per panicle were increased by 53.9% and 11.9% respectively in Liangyoupeijiu.The increase of panicle number per hill and grain number per panicle contributed to yield increase by 68% and 32% respectively in Xieyou9308,the increase of panicle number per hill increased from 68.7% to 82.3% in Liangyoupeijiu,grain number per panicle increased from 17.7% to 31.3%.Plant height in border hill was lower than one of central hill by 8.2%.But,dry matter,a panicle weight and grain number per panicle length and HI in plant border hill were increased by 20.9%,31.5%,17.8% and 8.8%.One grain per panicle in plants of border hills was the result of high percentage of high panicle compared with plants of central hills.Practice of space planting with wider row space in rice production was discussed.