Objective] This research almed to study technical requirements by seed breeding of Thuia sutchuenensis so as to Iay a foundation for the saving and breeding of Thuia sutchuenensis. [Method] The seeds of Thuia sutchuen...Objective] This research almed to study technical requirements by seed breeding of Thuia sutchuenensis so as to Iay a foundation for the saving and breeding of Thuia sutchuenensis. [Method] The seeds of Thuia sutchuenensis, coI-Iected from Xianyi Town, Chengkou County, Chongqing City, were used as material. The effects of temperature and matrix on germination rate and emergence rate of Thuia sutchuenensis were investigated. In addition, the controI effects of different-type and different-concentration pesticides on seedIing bIight of Thuia sutchuenensis were also studied. [Result] The suitabIe temperature for seed germination of Thuia sutchuenensis was 15-20 ℃, whiIe the optimum temperature was 20 ℃, under which the germination rate couId reach 95%. At temperature of 25 ℃, the seeds of Thuia sutchuenensis almost couId not germinate. The seeds of Thuia sutchuenensis germinated most if soaked in warm water of 40 ℃. After 24 h soaking, the germi-nated seeds were not increased significantIy. Among the matrixes for contalner seedIing, the 18th matrix, composed by sawdust （2/3） and forest topsoiI or general soiI （1/3）, was conducive to the seed germination in contalners. Among the pesti-cides, the controI effect of ferrous suIfate on diseases and pests in Thuia sutchue-nensis was best with cumuIative incidence of 15%, foI owed by those of fe-naminosuIf （17%）, Bordeaux mixture （21%）, KangkuIing （22%） and potassium per-manganate. [Conclusion] Sawdust had great effect on emergence rate of Thuia sutchuenensis in contalner seedIing, which might be reIated to good water retention and permeabiIity of sawdust. However, too much forest soiI was not conducive to the emergence rate of Thuia sutchuenensis in contalner seedIing. Ferrous suIfate had the best controI effect on diseases and pests in Thuia sutchuenensis.展开更多
文摘Objective] This research almed to study technical requirements by seed breeding of Thuia sutchuenensis so as to Iay a foundation for the saving and breeding of Thuia sutchuenensis. [Method] The seeds of Thuia sutchuenensis, coI-Iected from Xianyi Town, Chengkou County, Chongqing City, were used as material. The effects of temperature and matrix on germination rate and emergence rate of Thuia sutchuenensis were investigated. In addition, the controI effects of different-type and different-concentration pesticides on seedIing bIight of Thuia sutchuenensis were also studied. [Result] The suitabIe temperature for seed germination of Thuia sutchuenensis was 15-20 ℃, whiIe the optimum temperature was 20 ℃, under which the germination rate couId reach 95%. At temperature of 25 ℃, the seeds of Thuia sutchuenensis almost couId not germinate. The seeds of Thuia sutchuenensis germinated most if soaked in warm water of 40 ℃. After 24 h soaking, the germi-nated seeds were not increased significantIy. Among the matrixes for contalner seedIing, the 18th matrix, composed by sawdust （2/3） and forest topsoiI or general soiI （1/3）, was conducive to the seed germination in contalners. Among the pesti-cides, the controI effect of ferrous suIfate on diseases and pests in Thuia sutchue-nensis was best with cumuIative incidence of 15%, foI owed by those of fe-naminosuIf （17%）, Bordeaux mixture （21%）, KangkuIing （22%） and potassium per-manganate. [Conclusion] Sawdust had great effect on emergence rate of Thuia sutchuenensis in contalner seedIing, which might be reIated to good water retention and permeabiIity of sawdust. However, too much forest soiI was not conducive to the emergence rate of Thuia sutchuenensis in contalner seedIing. Ferrous suIfate had the best controI effect on diseases and pests in Thuia sutchuenensis.
