不同基质配比对白菜幼苗生长的影响

Effects of Different Substrate Formulation on the Growth of Chinese Cabbage Seedlings

以"抗大3号"大白菜为试材,采用混料设计法,将草炭、椰糠、珍珠岩按不同比例混配进行育苗试验,观察不同基质配比对大白菜生长的影响,并采用多元分析法研究不同变量之间的相关关系。对基质配比与基质理化性质、生长指标之间进行回归分析及典型相关分析,以期为育苗基质配比模型的建立及应用提供参考依据。结果表明:以椰糠代替部分草炭并添加珍珠岩可改善基质的理化性质,提高透气性和持水力。椰糠在基质中的含量与株高呈正相关,但过高不利于地上鲜物质的积累。在10个配方中,综合株高、主根长、叶面积、地上鲜质量、壮苗指数等指标及经济、生态效益分析得出,45%草炭+51%椰糠+4%珍珠岩是大白菜育苗的最佳配方。

Chinese cabbage(Brassica rapa var.glabra)variety‘Kangda No.3’was used as experimental material,the peat,coir pith and perlite were mixed in different proportions to carry out seedling experiment to study the effects of different matrix ratio on the growth of Chinese cabbage and the correlation among different variables by using the mixed material design method.The regression analysis and the canonical aralysis method were used on the ratio of mdrix,the physicochemical properhes of sabstrate and growth index of seedling,in order of provide ideas for the establishment and application of seedling matrix matching model.The results showed that replacing some peat with coir pith and adding perlite could improve the physicochemical properties of matrix and increase the permeability and water retention.And the content of coir pith in the substrate was positively correlated with plant height,but too high was not conducive to the accumulation of fresh material on the ground.Among the 10 formulations in this study,comprehensive growth index including plant height,root length,leaf area,aerial parts fresh weight,strong seedling index economic and ecological benefit analysis showed that 45%peat+51%coconut bran+4%perlite is the best formula for Chinese cabbage seedling.