沼气发酵残留物对苹果品质的影响

通过田间设置小区试验，研究分析了沼肥对果树产量、产值，苹果品质的影响。结果表明，应用沼肥进行根施和叶面喷施，具有促进果树生长发育，提高产量，改善果实营养品质，提高商品率，增加产值，减少农药、化肥的支出，降低了面源污染，改善了环境质量。沼肥:化肥=1:1的肥料配比效果最好，其中（1）施户用沼肥的苹果总产量增加6.61%，每公顷增收7626元，每公顷节支2100元，苹果的还原糖、维生素C、糖酸比的含量分别比CK高5.9%、67.6%、16.0%，达到显著水平；（2）施工程沼肥的苹果总产量增加6.80%，每公顷增收6268.5元，每公顷节支2100元，苹果的还原糖、维生素C、糖酸比的含量分别比CK高1.5%、3.1%、2.2%；（3）施工程沼肥与施户用沼肥的苹果品质差异较大。

Effect of Biogas Residues on the Quality of Apples

The results of healthy analysis of desert vegetation degenerating in Minqin show:based on the method of fuzzy differentiation in healthy analysis,the method can be not only used in the healthy analysis of vegetation,but also in the healthy sequence analysis of degenerated vegetation.Index selected is the key factor to influence the results.It is capable to analysis the natural characteristics of desert vegetation degenerating by dividing the index selected into two-types in dominant species(or shrub)and auxiliary species(or herbage),meanwhile to accurately show the affect factors to vegetation community by first grade analysis standard on the healthy of dominant species and companion species.The analysis result shows:the healthy is better in the same community at comparing to on moving dune or semi-moving dune and fixing dune.The healthy of dominant species obviously influence the health of community.The sensitivity analysis either check up the accurate of analysis consequence or direct what objects that are substituted by analysis standard act the function and status.