連作條件下外源一氧化氮對平邑甜茶幼苗影響的研究.pdf

1、山東農(nóng)業(yè)大學(xué)碩士學(xué)位論文連作條件下外源一氧化氮對平邑甜茶幼苗影響的研究姓名：高安妮申請學(xué)位級別：碩士專業(yè)：果樹學(xué)指導(dǎo)教師：毛志泉2011-06-14連作條件下外源一氧化氮對平邑甜茶幼苗影響的研究 2 Abstract This study was performed in the fruit roots laboratory of college of horticultural science and engineering, sha

2、ndong agricultural university and state key laboratory of crop biology from 2009 to 2011. In this study, a commonly apple rootstock M. hupehensis seedlings were used as materials. Effects of exogenous nitric oxide on the

3、 biomass, root architecture, activities of protective enzymes, oxidative damage and soil environment of seedlings of Malus hupehensis Rehd. under continuous cropping were investigated. The main results were as follows: 1

4、. Comparing with clear water treatment, the plant height, fresh weight, chlorophyll content and leaves area were significant increased in continuous cropping soil with. SNP treatment. The growth of seedlings had some dif

5、ferences in different concentrations of SNP under continuous cropping. At 200µmol·L-1 concentration, the plant height, fresh weight, chlorophyll content and leaves area were significantly increased, comparing w

6、ith clear water treatment, increased 59.69%, 74.25%, 45.70% and 116.58% respectively; with the SNP concentration increasing, plant height, fresh weight, chlorophyll content and leaves area were decreased. 2. Comparing wi

7、th SNP treatment, the total root volume were significant decreased in continuous cropping soil with clear water. The average diameter, total root volume, total root surface and number of tips had some differences in diff

8、erent concentrations of SNP under continuous cropping. At 200µmol·L-1 concentration, the average diameter, total root volume, total root surface and number of tips were the highest, with the SNP concentration i

9、ncreasing, root average diameter, total volume, total root surface area and number of tips were significantly decreased. Comparing with SNP 200µmol·L-1 treatment, the total volume and total root surface area de

10、creased 59.1% and 64.7% than SNP 1000 µmol·L-1 treatment. 3. Comparing with SNP treatments, the number of bacteria, fungi and actinomyces had not significantly differences, SNP treatment reduced the density of

11、herbivorous nematodes and soil pH, but different concentrations of SNP treatment herbivorous nematode density and soil pH had some differences, with the SNP concentration increasing, the density of nematode herbivores be