沸石复混肥对油菜苗期养分吸收、产量及土壤性状的影响

在盆栽条件下,比较了不同沸石含量的沸石复混肥对盆栽油菜苗期不同阶段N、P、K养分吸收量,油菜籽产量及土壤性状的影响.结果表明:沸石复混肥处理与对照复混肥比较,在苗期的前2个月,油菜吸收的N、P、K均为前者大于后者,而在第3个月开始,为后者大于前者.从整个苗期来看,相比复混肥对照,沸石复混肥处理的油菜N、P、K养分吸收量均有所下降,其中磷吸收量随沸石复混肥中沸石比例的增大而明显下降.沸石能减轻土壤酸化程度,提高土壤pH值,降低EXC-Mn.沸石在复混肥中的比例以10%～15%的含量较为合适,相比对照复混肥,增产可达9.7%.

Effects of zeolite blended compound fertilizer on nutrients uptake in seedlings, yield increment of rapeseed and soil properties

It was studied in pot experiments that N,P,K uptake in different seedling stages of rapeseed,yields of rapeseed,and soil properties by application of different zeolite content blended compound fertilizer(ZBF).The results showed that in the first two months,the N,P,K uptake treated with ZBF was higher than that of the CK.In the third month the N,P,K uptake was lower than that of CK.In general,the N,P,K uptake at seedling stage by application of ZBF all decreased,with P uptake of rapeseed decreased apparently with the increase of zeolite content in ZBF.Zeolite could release soil acidity,increase soil pH and decrease exchangeable Mn.The appropriate content of zeolite in ZBF was 10%~15% for rapeseed,and the yield increment was 9.7% compared to CK.