Please interpret the possible reasons of root-rot of plants in deep flow technique.

在深液流水培系统中，发现植物根系腐烂现象，试解释可能造成此现象的原因。

youdao

Please compare the advantages and disadvantages of deep flow technique (DFT) and Nutrient film technique while there are used in South China.

试比较深液流技术与营养液膜技术在我国南方实际生产应用上的优缺点。

youdao