Computer Simulation Of Dynamic Growth In B.napus

Nine types of rape (B.napus) are observed at Hunan Agricultral University. The leaf growth rate, leaf rear and leaf age on each leaf, effectively primary branches, effectively secondary branches, corniform pods on each plant, et are studied, we simulated the dynamic growth of B.napus by MATLAB language. By MATLAB language, We studied the correlation of the 10 main characters in B.napus between the yield and the correlation amony these characters. The resulds were as follows:1.About leaf growth rate in B.napus, It conformed to Logistic equation. The slower they growed before winter, the larger the correlation coefficient was.2. The leaf area was compared with the leaf age in the graph, under suitable cultiviation conditions, we knowed that the leaf area was extreme significantly correlated with the leaf age. That is to say, when the leaf area was larger, the leaf age was longer ,when the leaf area is the largest, the leaf age is the longest. About leaf area on each leaf, its variation of development accorded with y=axebx equation; About leaf age on each leaf, its variation development accorded with double-equetion y=ax2+bx+c.3. As far as the correlation of effectively primary branches, effectiuely seconedary branches, corniform pods on each plant etc between time were concerned, it accorded with non-symmetry S curve y=a+blgx.4. By analyzing the correlation coefficient of the 10 main characters between the yield in B.napus. its order was leaves on main stem>the diameter of root collar>the height of plant>effectively primary branches>green leaves on main stem>efTectively secondary branches>corniform pods on each plant>grains on each pod>the 1000-seed weight, the former 8 characters are extreme significantly correlated with the yield, but the correlations of the grains on each pod or the 1000- seed weight are not clear or negative.5. By line-regressing the green leaves on main stem, the leaves on main stem, the height of plant, the diameter of root collar, the output on each plant, the the corniform pods on each plant etc between the yield, the results were as follows: the leaves on main stem increased 1 before winter, the yield increases about 20kg per mu; the leaves on main stem increased 1, the yieldincreased about 5.4kg per mu; the height of plant increased 1 cm between 160cm and 180cm, the yield increased about 2kg per mu; the diameter of root collar increased 1mm, the yield increased about 3.33kg per mu; the output on each plant increased 1kg, the yield increased about 12kg per mu; the corniform pods on each plant increased 1, the yield increased about 0.7 per mu.