不同施肥处理对造林用红豆树幼苗高、径生长的影响

2019年3月,在浙江省温岭市采用1年生和2年生红豆树Ormosia hosiei实生苗造林,幼苗分别为地径2 cm带土球及营养钵苗、地径4 cm带土球截顶苗和全冠苗,于2019年10月测定苗木的高度、地径,分析不同试验处理(苗木规格、苗木类型、截干方式、施肥处理)对红豆树当年生幼树生长的影响。结果表明,在相同施肥措施下,地径2 cm幼苗适宜带土球种植,地径4 cm带土球幼苗进行截顶造林更利于植株的生长发育;不同施肥处理间也有较大差异,除地径2 cm营养钵幼苗施用菌根肥和混合施用菌根肥加30 g·株^-1复合肥表现出较明显受抑制生长外,其余各施肥处理对红豆树苗的生长均有不同程度的促进作用,其中以地径2 cm营养钵苗和地径2 cm带土球苗施用30 g·株^-1复合肥、地径4 cm带土球截顶苗施用50 g·株^-1复合肥生长效果明显高于其他施肥处理。选择高生长量、地径生长量、高径比和造林成本4项指标,采用模糊隶属函数法对红豆树苗不同处理条件下的综合效益进行综合评价,结果表明,红豆树幼苗采用地径2 cm带土球苗并施以30 g·株^-1复合肥的造林综合效益最高。

Effect of Different Fertilization Treatment on Growth of Different Ormosia hosiei Seedlings after Afforestation

In March 2019,experiments were implemented on effect of different fertilization treatment on afforestation of 1-year and 2-year Ormosia hosiei seedlings with different ground diameter,different seedling types and cutting back.In October of the current year,determination was carried out on height and ground diameter growth and height ground diameter ratio of seedlings.The result demonstrated that under the same fertilization treatment,height and ground diameter growth of seedling with 2 cm ground diameter by ball transplanting was evident higher than that of container ones.Under the same fertilization treatment,height growth of seedlings with 4 cm ground diameter by ball transplanting with cutting back was evident higher than that with complete crown ones,but ground diameter growth had no evident difference.Integrated evaluation was made by fuzzy subordinate function method on comprehensive benefits of afforestation O.hosiei seedlings under different treatment conditions.Height growth,ground diameter growth,height-ground diameter ratio and afforestation cost were selected as indicators.Results showed that the highest comprehensive benefit of afforestation of O.hosiei seedlings was with 2 cm ground diameter by ball transplanting and 30 g/plant compound fertilizer.