Studies On Physiological Effect Of Three Kinds Of Herbicides On J.regia.L

In order to improve the technology of chemical weed control in forestry and avoid the bad effect, herbicides were used in trees and they can make the trees better .Three kinds of nursery herbicides were used in the nursery. Growth, Chlorophyll, MDA, Soluble sugar were determined to use under three treatment of different medicament. The results showed (1) Growth and the other physiological indexes have evident differences among three kinds of herbicides, when they were used in normal density .The biggest controlling effect is Atrozine, the lest is Haloxyfop. (2) The influence of Fenoxaprop on the J.regia.L is little including Growth, Chlorophyll, MDA, Soluble sugar. BI has the controlling effect when it used after 10-15 days ; BII and BIII have evident effects when it treated after 5 days .All are not evident differences. (3) Atrazine affects all physiological indexes and all treatments are markedly different. YI has the best evident controlling effect of the growth, and the biggest controlling rate is 43.4%. With the density decreased, the controlling effect is also decreasing. YI is the largest among three treatment in all physiological indexes .YII is larger and YIII is the lest. (4) During the whole determined course , the effect of growth is evidently difference in all treatment. The controlling effect of GI is evident in prophase, and it decreases in the later . When considered about the other physiological indexes ,GI and GII have controlling effect and difference before 10 days ,GIII is abnormal, all indexes are higher than CK.The result demonstrated that some means of herbicides were used in the J.regia.L nursery. Fenoxaprop was used when the J.regia.L germinates before or after 5 days , but the concentration should be lessen than 5ml/l; they suggested that Atrazine was sprayed or treated in soil in 13g/l before the J.regia.L germination ,or it may be used in 6.5g/l, or some protecting ways of trees were used in normal density; Haloxyfop should be applied in the normal density and it's effect is better.