不同药剂对青冈容器苗生长的影响

Chemical reagents with Cyclobalanopsis glauca container seedlings

采用硫酸铜（Cu SO4）,硫酸锌（Zn SO4）,硫酸铝[Al2（SO4）3]和氟乐灵等4种药剂分别配制成不同质量浓度[CuSO4,Zn SO4,Al2（SO4）3,40,80,140,220 g·L-1,氟乐灵0.04,0.08,0.14,0.22 g·L-1],与乳胶漆充分混合后涂在无纺布袋内壁和底部,以只涂乳胶漆为对照。分析了4种药剂对4年生青冈Cyclobalanopsis glauca容器苗的根系形态参数、根系活力、苗高、地径、生物量积累、苗木品质指数等的影响。结果表明：1铜（Cu）,铝（Al）,锌（Zn）在0~140 g·L-1质量浓度范围内和氟乐灵在0~0.22 g·L-1质量浓度范围内对青冈容器苗具有控根作用,但220 g·L-1硫酸锌会对青冈苗木产生严重的负面影响。2各药剂处理中,140 g·L-1硫酸锌是最适宜的控根试剂,显著增加了青冈苗木根系的根尖数、根系体积、根系表面积、根系分枝数、根系活力、苗高、地径、地上干质量和根部干质量等（P〈0.05）,且显著减小了根系平均直径和主根长（P〈0.05）。

In order to understand the effects of different chemical reagents on the growth of Cyclobalanopsis glauca container seedlings, the chemical root control concentrations of CuS04 40, 80, 140, 220 g·L-1, ZnSO4 40, 80, 140, 220 g·L-1, A12 （S04） 3 40, 80, 140, 220 g. L-l, and 2,6-Dinitro-N,N-dipropyl-4- （trifluoromethyl） aniline 0.04, 0.08, 0.14, 0.22 g·L-1 were mixed with emulsion varnish and then coated on the inner wall of root control bags. These were compared to a treatment where the inner wall was coated on only with emulsion varnish. Then the effect of the chemical reagents on root configuration indexes, root activity, height, base diameter, biomass accumulation, and quality index of four-year-old Cyclobalanopsis glauca container seedlings were analyzed. Results showed that： （1） reagents of CuSO4, ZnSO4 and A12（S04）3 in the range of 0-140 g·L-1 as well as 2,6- dinitro-N,N-dipropyl-4-（trifluoromethyl） aniline in the range of 0-0.22 g·L-1 regulated root growth and development of C. glauca, but reagent of 220 g·L-1 ZnSO4 had a negative effect on seedlings. （2） Root tips, volume, surface area, projected area, forks, and activity, as well as plant height, basal diameter, shoot dry weight, root dry weight and quality index treated with 140 g·L-1 CuS04 reagent significantly increased （P〈 0.05）, whereas root average diameter and length of taproot significantly decreased （P〈0.05）. Seedlings treated with different chemical reagents showed improved root controling with the best treatment being 140 g·L-1 ZnS04. [Ch, 4 fig. 2 tab. 15 ref.]