喷施宝对圆齿野鸦椿生长及生理特性的影响

发布时间：2018-06-21 01:41

本文选题：喷施宝 + 生长量　；参考：《江西农业大学》2015年硕士论文

【摘要】：本试验采用随机区组设计,研究喷施宝对圆齿野鸦椿两年生苗生长及生理特性的影响,以筛选出促进圆齿野鸦椿苗木生长、提高苗木抗逆性的喷施宝最佳使用浓度,为圆齿野鸦椿苗木生产提供参考。试验结果表明:(1)喷施宝具有促进圆齿野鸦椿苗木生长的作用。当喷施宝浓度为0.50 m L·L~(-1)时,苗高增长量最大,与对照相比差异达极显著水平;喷施宝浓度从0.33 m L·L~(-1)~2.0m L·L~(-1)之间差异均不显著。当喷施宝浓度为2.0 m L·L~(-1)时,地径增长量最大,与对照相比差异达显著水平;喷施宝浓度从0.25 m L·L~(-1)~2.0 m L·L~(-1)之间差异不显著。喷施宝浓度为1.0 m L·L~(-1)时,苗木生物量和根冠比最大,但各处理之间差异不显著。故从保护生态和降低成本的角度考虑,促进圆齿野鸦椿苗木生长的喷施宝最佳使用浓度为0.33 m L·L~(-1)~0.50 m L·L~(-1)。(2)喷施宝具有提高圆齿野鸦椿苗木叶片中的可溶性糖、可溶性蛋白质的含量,以及超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)的活性,从而可以提高苗木的抗逆性。利用隶属函数法对苗木的抗逆性进行综合评价,结果表明,各处理苗木的抗逆性由强到弱排序依次为:处理3(0.50 m L·L~(-1))处理2(0.33 m L·L~(-1))处理1(0.25 m L·L~(-1))处理4(1.00 m L·L~(-1))处理5(2.00 m L·L~(-1))CK(喷清水),即处理3:喷施宝浓度为0.50 m L·L~(-1)时苗木的抗性最强。(3)喷施宝可显著提高圆齿野鸦椿苗木叶片中叶绿素及氮素养分的含量,从而促进苗木生长。喷施宝浓度为1.0 m L·L~(-1)~2.0 m L·L~(-1)时,苗木叶片中的叶绿素及氮元素含量最高。并且叶绿素及氮元素含量均与苗高增量呈显著正相关,与地径增量呈极显著正相关。(4)喷施宝还可显著提高土壤中的氮含量,喷施宝浓度为1.0 m L·L~(-1)~2.0 m L·L~(-1)时,土壤氮含量最高。喷施宝对土壤中磷含量无显著影响,但施用喷施宝后土壤含磷量均较喷施前土壤含磷量低;此外,喷施宝会显著降低土壤钾含量,可见,喷施宝可促进苗木对土壤磷、钾的吸收;因此,生产上在施用喷施宝叶面肥的同时,应增加磷、钾肥的施用量。
[Abstract]:In this study, a randomized block design was used to study the effects of spraying Bao on the growth and physiological characteristics of two year old seedlings of Toona sinensis, in order to screen out the best concentration of spraying Bao to promote the growth and improve the resistance of the seedlings. It provides a reference for the seedling production of Toona davidifolia. The results showed that the effect of spraying treasure on the seedling growth of Toona sinensis was improved. When the concentration of spraying treasure was 0.50 mL / L, the seedling height increased the most, and the difference was very significant compared with the control, but there was no significant difference between spraying concentration from 0.33 mL / L ~ (-1) ~ (-1) to 2.0 mL / L ~ (-1). When the concentration of spraying treasure was 2.0 mL / L ~ (-1), the increase of ground diameter was the largest, and the difference was significant compared with the control, but there was no significant difference between the concentration of spraying treasure from 0.25 mL / L ~ (-1) ~ (2. 0 mL / L ~ (-1) ~ (-1). The biomass and root-shoot ratio of seedlings were the largest when the concentration of spraying treasure was 1.0 mL / L ~ (-1), but there was no significant difference among the treatments. Therefore, from the point of view of protecting ecology and reducing the cost, the optimum application concentration of spraying treasure to promote the growth of Toona sinensis seedlings is 0.33 mL / L Lnelmina (0.50 mL / L / L / L / L / L / L / L / L / L / L / L / L / L / L / L / L / L / L / L / L / L / L / L ~ (-1) / L ~ (-1) ~ (-1). The activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (catalase) can improve the stress resistance of seedlings. The method of membership function was used to evaluate the stress resistance of seedlings. The order of the stress resistance of each treatment was: treatment 30.50ml / L / L ~ (1 / L) treatment 2n / 0.33m / L / L / L / L / L ~ (1 / 1) treatment _ (1n ~ (0.25) m / L / L / L ~ (1 /) treatment (41.00 m / L / L / L / L / L ~ (1) treatment (52.00m / L / L / L / L / L ~ (1) CK (treatment 3: spraying concentration = 0.50 mL / L / L / L ~ (-1) the resistance of the seedlings was the strongest. (~ (3) ~ (3) ~ (1) = 0.50 mL / L / L / L / L ~ (+) ~ (-1) Spraying with Bao could significantly increase the content of chlorophyll and nitrogen in the leaves of Toona sinensis seedlings. So as to promote the growth of seedlings. The content of chlorophyll and nitrogen in seedling leaves was the highest when the concentration of spraying treasure was 1.0 mL / L ~ (-1) and 2.0 mL / L ~ (-1) / L ~ (-1). There was a significant positive correlation between chlorophyll and nitrogen content and seedling height increment, and a very significant positive correlation between chlorophyll content and basal diameter increment. (4) spraying Bao also significantly increased the nitrogen content in soil. The soil nitrogen content was the highest when the spraying concentration was 1.0 mL / L ~ (-1) and 2.0 mL / L 路L ~ (-1). Spraying treasure had no significant effect on phosphorus content in soil, but the phosphorus content of soil after spraying treasure was lower than that before spraying, in addition, spraying treasure could significantly reduce the content of potassium in soil. Therefore, the amount of phosphorus and potassium fertilizer should be increased when applying leaf fertilizer in production.
【学位授予单位】：江西农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S792.99

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