本文报道大豆孢囊线虫4号小种新抗源的筛选和利用研究结果。
This is the report concerning the screening and utilization of new resistant sources to race No. 4 of soybean cyst nematode.
研究了在不同土壤类型条件下连种抗病品种和感病品种后，大豆孢囊线虫数量变化。
Resistant and susceptible varieties of soybean were planted continuously in different types of soil and the number of cyst nematode in the root system was counted.
田间试验结果表明，影响大豆孢囊线虫病发生程度的主要因素是土壤有机质、茬口、土壤含水量等。
The result of field test shows that the main factors which affect the degree of SCN are organic matter, crops rotation and soil humidity etc.
田间试验结果表明，影响大豆孢囊线虫病发生程度的主要因素是土壤有机质、茬口、土壤含水量等。
The result of field test shows that the main factors which affect the degree of SCN are organic matter, crops rotation and soil humidity etc.
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