灰色关联度分析基于灰色关联度分析的烤烟施肥优化方案

对云南省金沙江干热河谷永仁地区油橄榄园地进行覆盖试验，研究了不同材料覆盖后油橄榄园土壤温度、水分、容重变化。结果表明,覆盖对土温变化的调节作用主要表现在土壤表层，随土层深度增加调节作用减小；夏季油橄榄园覆盖后随气候温度升高土壤温度日变幅减小；不同材料覆盖间存在差异，薄膜覆盖土温变幅最大，纸箱次之，秸秆变幅最小。覆盖提高了园地土壤含水量，有较好的保墒效果；覆盖秸秆、杂草0～20 cm土层含水量较高；随着土壤深度增加，不同覆盖处理之间土壤水分含量差异增大。4种材料覆盖均有利于降低土壤容重，其中以秸秆效果最显著。

Optimization of Flue cured Tobacco Fertilization Scheme on the Grey Relational Grade Analysis

Based on experiment on mulching Olea europaea L.garden in dry and hot valley of Yunnan with different mulching materials, the dyanmic change of temperature, moisture and unit weight in the garden soil were detected and analyzed. The results showed that adjustment of mulching on soil temperature is mainly to upper layer. The daily change of soil temperature decrease with air temperature increase in summer after mulching. The change of soil temperature is different with different mulching materials, of which with plastic mulching is the greatest, paper box mulching is greater and that of straw is the least. Mulching has raised soil moisture in the garden. The moisture keeping capacity shows the highest with straw mulching in 0~20 cm layer. However, the difference of soil moisture increase with the soil depth among 4 mulching materials. All mulching can decrease soil unit weight. And straw mulching has the most effects.