Sixty-eight ancient cultivated rice grains of 10 ruins of 2000-15000 BP in theChangjiang River valley were studied by analyzing grain shape, using discri-minat formulas of hi-peaked tubercle(BPT) with the G (x) = 44. ...Sixty-eight ancient cultivated rice grains of 10 ruins of 2000-15000 BP in theChangjiang River valley were studied by analyzing grain shape, using discri-minat formulas of hi-peaked tubercle(BPT) with the G (x) = 44. 4788 -0. 4308X- 0. 4263 X+ 0. 078 X, where Xis hi-peaked distance( BPD), Xis peaked angle (PA), and Xis ratio of hi-peaked distance/col depth (BPD/展开更多
During the 1970’s and 1980’s studies on the rela-tion between LAI and yield had been carried out inGAAS.The main results were as follows:(1)Usingthe accumulated LAI value at three stages,i.e.panicle initiation(PI),h...During the 1970’s and 1980’s studies on the rela-tion between LAI and yield had been carried out inGAAS.The main results were as follows:(1)Usingthe accumulated LAI value at three stages,i.e.panicle initiation(PI),heading(H)and 20 d afterheading(H),to analyze the relation between LAIand yield was more accurrate than only using theLAI value at H stage(see table);(2)Reaching cer-展开更多
文摘Sixty-eight ancient cultivated rice grains of 10 ruins of 2000-15000 BP in theChangjiang River valley were studied by analyzing grain shape, using discri-minat formulas of hi-peaked tubercle(BPT) with the G (x) = 44. 4788 -0. 4308X- 0. 4263 X+ 0. 078 X, where Xis hi-peaked distance( BPD), Xis peaked angle (PA), and Xis ratio of hi-peaked distance/col depth (BPD/
文摘During the 1970’s and 1980’s studies on the rela-tion between LAI and yield had been carried out inGAAS.The main results were as follows:(1)Usingthe accumulated LAI value at three stages,i.e.panicle initiation(PI),heading(H)and 20 d afterheading(H),to analyze the relation between LAIand yield was more accurrate than only using theLAI value at H stage(see table);(2)Reaching cer-
