Early growth of weeping love grass and its competition-Density effect
1967 Volume 30 Issue 4 Pages 29-35
Details
1967 Volume 30 Issue 4 Pages 29-35
The investigations on the relation between the early growth and the sown density about weeping love grase were carried out on the field for about 135 days from 28th June, '66, in order to get fundamental materials for cultivation and maintenance of vegetation on roadside slopes.
Seeds were sown with 4 grades of density, i. e. 0.1gr/m2. 0.5gr/m2, 2.0gr/m2, and 8.0gr/m2.
The results were obtained as follows;
1) Germinating rate decreased, as sown density increased. The germinating rate in 8.0gr/m2 plot was 1/4 in 0.1gr/m2 plot.(Table 4 and Fig. 2)
2) On the 135th day after seeding, the slope of the C-D curve became nearly 45° (C-D index a-1 in formula (1)), and the Y-D curve became a horizontal line (formula (3)). At that time final yield per each plot was constant independently of density (formula (2)).
3) In the lower density plot (0.1gr/m2 or 0.5gr/m2), the values of dry weight per plant, number of tillers, the greatest width of leaves and also diameter of stock were greater. On the contrary, in the higher density plot (2.0gr/m2 or 8.0gr/m2), the individuals were feeble.
4) In the earlier time of growth, the significance of top and root elongations among 4 plots were recognized, but as plants grew, the significances could not be found.(Table 6 and 7)
