包膜肥对设施番茄产量及土壤氮、磷累积的影响

Effects of Coated Fertilizers on Tomato Yield and Accumulation of Soil Nitrogen and Soil Phosphorus in Greenhouses

采用小区试验方法研究包膜肥对设施番茄产量及土壤N、P累积的影响,结果表明:施用包膜肥处理与传统处理相比,在中期50d时提高了表层(0-30cm)土壤中氮的含量,而对60-120cm土层的影响不明显,对磷的影响在表层和地下都不明显。在种植结束时(110d),包膜肥处理在0-120cm的土层中都显著降低了氮的含量,在0-30cm中提高了磷的含量,但在30-120cm的土层中没有显著影响。相同施肥量时,在110d时包膜肥处理降低了N、P在30cm以下土层中的累积,同时包膜肥可显著提高番茄产量;在包膜肥追肥量较传统处理减少1/3时,产量依然没有显著降低。包膜肥处理较传统处理也降低了番茄硝酸盐的累积。

In the greenhouse,the effects of coated fertilizers on the tomato yield and the accumulation of soil N and soil P were studied.The results showed that compared to the traditional processing,in the planting medium-term,coated processing could improve the content of soil N in top soil,but had no obvious effects on the soil horizon of 60-120 cm.At the same time,the treatment had no significant influence to the contents of soil P either surface or underground.At the end of time（110 d）,because of the coated fertilizer the content of N decreased significantly in different soil horizons（0-120 cm）;the content of soil P improved in the layer of 0-30 cm,but there were no significant impact in the soil layer of 30-120 cm.Using the same application rate,coated fertilizers not only reduced the accumulation of soil N and soil P below 30 cm on the 110th d,but also significantly increased tomato yield.When the application dosage of the coated fertilizer decreased by 1/3 compared with the conventional treatment,tomato yield had not significant reduction.And the coated fertilizers also reduced nitrate accumulation of tomatoes.