YHJ

This showed that plants treated with YHJ were shorter than the control and the height of the plant decreased according to the concentration of YHJ (4 mL/kg greater than 8 mL/kg greater than 16 mL/kg).

Increase in YHJ concentration led to reduction in leaf area.YHJ treatment also influenced leaf blade's length and width.

Above ground and underground of corn seedlings: The accumulation of aboveground and underground dry material gradually decreased upon increasing the YHJ concentration.

At 20 days after emergence, data could not let us to conclude about the 3rd layer, but the results obtained enabled us to conclude that the increase in root length was inversely proportional to the concentration of YHJ.

The radicle length: It was observed that YHJ inhibited the radicle growth and this inhibitory effect kept on increasing with the concentration.

Increased YHJ concentration initially resulted in decrease root shoot ratio, but this ratio later increased with time.

Effect of YHJ on plant height and ear height: YHJ showed no significant effect on plant height, and this can be seen under 70,000/ha and 90,000 /ha high plant density, where plant seeds with dressing (BD7 and BD9) had slightly decreased height as compared to the plants without dressing (D7 and D9).

Effect of YHJ on flexural strength and stretch bending: There was gradual decrease in flexural strength of II, III and IV nodes.

Effect of YHJ on internode length and lodging rate: Internodes lengths for seven internodes (I-VII) below ear were measured and labelled as 1, 2, 3, 4, 5, 6 and 7 internodes.

Effect of YHJ on yield and yield components: Variance analysis showed that yield under different densities was greatly different (pless than 0.05).

Above analysis concluded that the influence of YHJ on yield was not significant under low density, but yield was significantly increased under high plant density mainly due to the increased effect of YHJ on the number of productive ears per unit area.

In the present study, the data implied that YHJ might be an important regulator of maize lodging.