The variation of soil fertility in different ages of greenhouses in the suburb of Jinhua city, Zhejiang province was researched. The results showed that soil organic matter, available nitrogen and available phosphorus contents increased with the increase of greenhouse age, and their correlation coefficients were 0.9311, 0.9517 and 0.9749 respectively ( P ＜ 0. 05 ). The accumulation of soil organic matter was significant, and the content of soil organic matter has reached a very high level. In the greenhouses which have been used to cultivate for above 5 years, the contents of available nitrogen and available phosphorus in the soil basically reached a mid -high level. The available K content in the soil also increased to a certain extent. However, soil pH -value reduced along with the increase of greenhouse age, there was significantly negative correlation between them, and the soil acidification trend was obvious.%对浙江金华市郊不同棚龄的设施土壤肥力变化的研究结果表明:大棚设施土壤有机质、速效氮和速效磷含量均随棚龄的增加而递增,均与棚龄呈显著正相关,其相关系数分别为0.9311、0.9517和0.9749.其中,土壤有机质积累明显,含量均已达极高水平;而设施栽培年限≥5年的土壤速效氮、磷含量基本处于中高水平;土壤速效钾含量也有一定程度的增加;但设施土壤pH值随棚龄增加而降低,两者之间呈显著的负相关,土壤酸化趋势较为明显.
展开▼
