行内覆盖对葡萄园微环境、果实品质及土壤微生物的影响OA

In order to explore the regulatory effects of inrow cover on microenvironment,photosynthetic physiology,berry and wine quality,as well as soil microorganisms in'Merlot'vineyards at the eastern foothills of the Helan Mountains,and screen green soilmanagement patterns suitable for this region.Two treatments(inrow natural grass cover and weedcontrol fabric cover)were set up,with clean tillage as the control.Fruitzone temperature and humidity,photosynthetic characteristics,berry sugaracid dynamics and quality,and physicochemical indexes of wine were monitored.Soil microbial population was determined,followed by correlation analysis and productioncost evaluation.The results showed that,both cover treatments reduced fruitzone temperature,increased humidity,and markedly alleviated sunburn and shriveling of berries.Natural grass cover produced the best effects,with net photosynthetic rate and wateruse efficiency increased by 17.4％and 27.5％compared with clean tillage.Covering delayed veraison and ripening,and promoted phenolic accumulation.Under natural grass cover,cluster weight increased by 13.51％,while total phenol,flavonoid and tannin in berries rose by 38.10％,26.32％and 31.82％,respectively,together with improved winequality.Natural grass cover increased soil bacterial,fungal and actinomycete populations by 130％,179％and 160％relative to clean tillage.Microbial quantities were significantly correlated with environmental and quality indicators.Its management cost decreased by 93.3 yuan·(667 m2)-1(46.7％reduction).In conclusion,inrow natural grass cover optimizes vineyard microenvironment,improves photosynthetic performance,enhances grape and wine quality,modifies soil microbial community and cuts management costs.It is suitable for popularization in'Merlot'vineyards of the eastern foothills of the Helan Mountains.