本文選題：致病性尖孢鐮刀菌 + 土壤團(tuán)聚體�。� 參考：《江蘇農(nóng)業(yè)學(xué)報》2017年02期

【摘要】：為了解致病性尖孢鐮刀菌在土壤團(tuán)聚體中分布狀況并從土壤養(yǎng)分方面弄清其分布機(jī)制,本試驗將土壤滅菌后接種致病性尖孢鐮刀菌,并分別添加不同養(yǎng)分元素(有機(jī)物、氮、鉀、鈉、鈣、鎂、銅、鋅、鐵、錳)培養(yǎng)15 d后,通過干篩法將土壤篩分為4種粒徑團(tuán)聚體(4.0 mm、2.1~4.0 mm、1.1~2.0 mm、≤1.0 mm),測定土體土及團(tuán)聚體中尖孢鐮刀菌數(shù)量。結(jié)果表明,添加有機(jī)物顯著增加了土體土中尖孢鐮刀菌數(shù)量,而添加氮、鈣、鎂、銅、鋅、鐵、錳顯著降低了土體土中尖孢鐮刀菌數(shù)量。添加不同養(yǎng)分元素顯著改變了尖孢鐮刀菌在不同粒徑團(tuán)聚體中的分布。通過相關(guān)性分析發(fā)現(xiàn),土體土中尖孢鐮刀菌數(shù)量與1.1~4.0 mm粒徑團(tuán)聚體中尖孢鐮刀菌數(shù)量顯著相關(guān)。據(jù)此推測,不同養(yǎng)分元素主要是通過影響尖孢鐮刀菌在1.1~4.0 mm粒徑團(tuán)聚體中定殖狀況而最終影響土體土中尖孢鐮刀菌的生長。
[Abstract]:In order to understand the distribution of Fusarium oxysporum in soil aggregates and the mechanism of soil nutrient distribution, soil was inoculated with Fusarium oxysporum after sterilization, and different nutrient elements (organic matter, nitrogen, nitrogen) were added to the soil. Potassium, sodium, calcium, magnesium, copper, zinc, iron and manganese) were cultured for 15 days. The soil was screened by dry sieving method into 4 aggregates with diameter of 4.0 mm ~ 2.1 ~ 4.0 mm ~ (-1) ~ 2.0 mm, 鈮，

本文編號：1854559