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研究土施麦芽糖等糖类对重茬土壤改良和苹果砧木生长的影响,为缓解当前苹果连作障碍提供新的途径。2014年4月,在装有10kg重茬土的苗盆中栽种长出5片真叶的平邑甜茶幼苗,分别施入浓度为50,100,200mg/kg的果糖、葡萄糖、麦芽糖和阿拉伯糖;2014年9月,测量生长量、土壤微生物及土壤总有机碳(TOC)。结果表明:与CK相比,200mg/kg葡萄糖处理,株高增加52.9%;200mg/kg麦芽糖处理,地茎增加12.2%、叶绿素相对含量增加12.5%;100mg/kg葡萄糖处理光合速率增加18.5%;50mg/kg果糖和阿拉伯糖处理能显著增加土壤中的细菌数量,分别增加了119.7%和127.6%;土壤中的放线菌数量会随着阿拉伯糖的施入浓度增加而显著提高,按施入浓度从低到高,土壤放线菌的数量分别增加了66.7%,222.9%,266.7%;50mg/kg麦芽糖处理,土壤中的真菌数量降低最多,减少了71.7%,效果极显著;100mg/kg葡萄糖处理,土壤TOC含量最高,升高60.0%。在研究结果基础上进行主成分分析得知,在100mg/kg麦芽糖处理下,相对于CK,株高提高47.9%、茎粗增加11.1%、叶绿素相对含量提高8.5%、光合速率提高16.3%、土壤中真菌数量降低49%、土壤中TOC含量高47.6%,均差异极显著。综上,土施100mg/kg麦芽糖显著提高苹果砧木生长;抑制重茬土中土壤真菌数量优势明显,其土壤改良效果显著。
To study the effects of maltose and other sugars on soil improvement and apple rootstock growth, and to provide a new way to alleviate the current cropping obstacles. In April 2014, seedlings of 5-mulberry leaf of Eutaste in sweet potato seedlings were planted in pots containing 10 kg of re-stubble soils with fructose, glucose, maltose and arabinose at 50, 100 and 200 mg / kg, respectively. In 2014 Month, measured growth, soil micro-organism and soil total organic carbon (TOC). Compared with CK, the plant height was increased by 52.9% when treated with 200mg / kg glucose, CK was increased by 12.2% with the treatment of 200mg / kg maltose, the relative content of chlorophyll increased by 12.5%, and the photosynthetic rate increased by 18.5% 50mg / kg fructose and arabinose significantly increased the number of bacteria in the soil, an increase of 119.7% and 127.6%, respectively. The amount of actinomycetes in soil increased significantly with the increase of the concentration of arabinose, The concentration of actinomycetes increased from 66.7%, 222.9% and 266.7%, respectively. When the concentration of 50mg / kg maltose was decreased, the number of fungi in soil decreased by 71.7% Under the treatment of glucose, soil TOC content was the highest, increasing 60.0%. Based on the results of principal component analysis, the plant height was increased by 47.9%, the stem diameter increased by 11.1%, the relative content of chlorophyll increased by 8.5% and the photosynthetic rate increased by 16.3% under the treatment of 100mg / kg maltose, 49% lower number of fungi, TOC content in soil was 47.6%, the difference was significant. In summary, soil application of 100mg / kg maltose significantly increased the growth of apple rootstocks; inhibit the number of soil in the repeated cropping soil obvious advantages, the soil improvement effect is remarkable.