关键词: 番茄叶霉病, 番茄叶霉病, 番茄叶霉菌

Abstract: Through the soil sampling diagnosis, we discuss the condition of the farming soil quality of Changxing city which in the north of Zhejiang province.And we have found that the quality of the soil fertility has changed. The content of soil ulmin,and the entire nitrogen have slightly rise; compares to 20 years ago , the average content of soil effective phosphorus has slightly increased,but the condition that the soil lack of the phosphorus is still obviously;Athough the content of fast-acting potassium has slightly down,it still stand in a low level,so the soil can’t satisfies the needs of the plant normal live.The soil acidification became the soil degenerate new question.The change of soil fertility quality is related to the fertilizer structure,and the change of planter system ,and the change of industrial development and so on in the recent 20 years.