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对湿地松苗期黄化现象进行了大量调查，采集湿地松正常苗和黄化苗及相应育苗基质２６个样品，进行常量和微量元素分析；苗期黄化种质、侵染性、基质Ｃ／ｎ值等试验。湿地松苗期黄化非种质所引起；不具侵染性；基质ｐＨ值大于７，速效磷大于４００ｍｇ／ｋｇ，交换性钙（１／２Ｃａ）大于１０ｃｍｏｌ／ｋｇ，Ｃ／Ｎ值大于１８０，湿地松苗期均出现黄化现象；此外，基质积水，基质中参有未腐熟有机质，低温移栽等也会导致苗期黄化。提出了相应的湿地松苗期黄化预防措施。
A great deal of investigation was done on the phenomenon of etiolation of Pinus elliottii and 26 samples of P. elliottii, P. euchiophylla and corresponding nursery substrate were collected for the analysis of macroreticula and trace elements. The yellowing germplasm, infectivity, matrix C / n value and other tests. P. elliottii was caused by yellowing of non-germplasm at seedling stage; it was not invasive; the pH value of the matrix was more than 7, the available phosphorus was more than 400mg / kg, the exchangeable calcium (1 / 2Ca) was more than 10cmol / kg, All appear yellow phenomenon; In addition, the matrix water, the substrate is not decomposed organic matter, low temperature transplanting, etc. can also lead to seedling yellow. The corresponding prevention and cure measures of P. elliottii at seedling stage were proposed.