
不同泥炭替代基质对薄壳山核桃幼苗生长及叶绿素荧光特性的影响
季艳红, 潘平平, 窦全琴, 谢寅峰
南京林业大学学报(自然科学版) ›› 2022, Vol. 46 ›› Issue (1) : 145-155.
不同泥炭替代基质对薄壳山核桃幼苗生长及叶绿素荧光特性的影响
Effect of fungus-residue and other matrix formulations on growth and chlorophyll fluorescence parameters of shelled walnut seedlings
【目的】探讨添加不同配比的泥炭替代基质如菌渣或醋糟等组成的混合基质处理对薄壳山核桃(Carya illinoinensis)容器苗生长以及叶绿素荧光特性的影响,筛选适宜苗木生长的低成本配方基质。【方法】以薄壳山核桃‘绍兴’子代1年生容器苗为材料,设置园土、泥炭、醋糟体积比为4:3:3(A1)、4:2:4(A2)、4:1:5(A3)和园土、泥炭、菌渣体积比为4:3:3(B1)、4:2:4(B2)、4:1:5(B3)配方,园土为对照(CK),共7个处理,分别测定苗高、地径和叶绿素荧光参数等指标,分析不同配比的基质处理下对薄壳山核桃容器苗生长与荧光特性的影响。【结果】不同配比的泥炭替代基质处理下苗木生长指标差异显著,添加菌渣、醋糟较园土均可降低基质容重,提高基质的通气孔隙度,增加有机质含量等,其中添加菌渣的基质配方有利于薄壳山核桃幼苗的生长,且以B3处理效果最佳。该处理苗木的苗高、地径以及叶片各项叶绿素荧光参数均显著高于对照,其中苗高、地径分别比对照增加了65%和73%。【结论】综合苗木的各项指标并考虑各项成本,减少泥炭用量,以园土、泥炭、菌渣体积比4:1:5低成本混配基质适于薄壳山核桃容器苗生长,提高苗木光能利用效率,且育苗成本较低,利于生产推广应用。
【Objective】 This study aims to investigate the effect of substrate formula like bacterial residue on seedling growth and fluorescence characteristics of Carya illinoinensis seedings and select a low-cost substrate formula suitable for seedling growth.【Method】 One-year-old container seedlings of Carya illinoinensis ‘Shaoxing’ progeny were used as material. The garden soil, peat, vinegar bad volume ratios were respectively set to 4:3:3 (A1), 4:2:4 (A2), 4:1:5 (A3) and garden soil, peat, mushroom residue volume ratios were respectively set to 4:3:3 (B1), 4:2:4 (B2), 4:1:5 (B3) formula, garden soil was the control (CK), seven treatments were used. The seedling height, ground diameter and chlorophyll fluorescence parameters of these treatments were determined to analyze the effects of different matrix formula on the growth and fluorescence properties of C. illinoinensis container seedling.【Result】 The seedling growth indexes of the different treatments significantly differed. Unlike garden soil, adding mushroom residue and vinegar bad could decrease the bulk density, increase the ventilation of the matrix porosity and organic matter and so on. Adding mushroom residue substrate was conducive to the growth of C. illinoinensis seedlings. Besides, The order of treatments from small to large according to seedling height was CK < A3 < A1 < A2 < B1 < B3 < B2; the order according to ground diameter was CK < A1 < A2 < A3 < B1 < B2 < B3. The addition of B2 and B3 bacterial residues into the substrate was the most suitable for the growth of seedlings. Seedling height and ground diameter of seedings that treated by B3 garden soil, peat, mushroom residue volume 4:1:5 matrix were significantly higher than that of control, increased by 65% and 73% respectively. Also, In terms of chlorophyll fluorescence parameters, the Fv/Fm ratio of B substrate treatment was higher than that of A substrate treatment in June and July, and there was no significant difference between A substrate and B substrate treatment in August and September. The Fv/F0 of seedlings treated with B substrate was higher than that of seedlings treated with A substrate in June to August, and the Fv/F0 of seedlings treated with A substrate was higher than that of seedlings treated with B substrate in September. The Fv '/Fm' index of all seedlings treated with B substrate was higher than that of seedlings treated with A substrate except in July. ΦPSⅡ of seedling treated with substrate B in June to July was higher than that of treated substrate. The photochemical quenching (qP) of seedling treated with the substrate B in June to July was higher than that treated with the substrate. Non-photocheroical quenching (NPQ) A of seedlings treated with A substrate were consistently higher than those treated with B substrate from June to September. During June to September, the chlorophyll fluorescence parameters of B3 treated seeding were significantly higher than control. According to the correlation analysis, the seedling height, and the maximum water holding capacity and organic matter content were significantly positively correlated.There was a significant positive correlation between ground diameter and maximum water holding capacity.There is a high correlation between available phosphorus and available potassium, which was related to the pH value in the formula matrix. The suitable pH value was conducived to the conversion of phosphate and exchangeable potassium ions. When the pH value was between 6.0 and 6.5, the availability of phosphorus and potassium in the matrix was the highest. Seedling height, ground diameter and F0, Fm, Fv'/ Fm, ΦPSⅡ and qP was significantly positively related, seedling height and NPQ was significantly negative correlation, and ground diameter were very significant negative correlation with NPQ.【Conclusion】 In order to reduce the amount of peat, the mixture matrix of garden soil, peat and bacterial residue with a volume ratio of 4:1:5 was suitable for improving the growth and the light energy utilization efficiency of C.inillinoinensis seeding, moreover, its cost of seedling cultivation decrease, which was conducive to production and application.
薄壳山核桃 / 容器苗 / 基质 / 生长量 / 叶绿素荧光
Carya illinoinensis / container / seedling matrix / growth / chlorophyll fluorescence
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