广东合水水库淤积物直接利用对蔬菜种植效应的影响

利用网室盆栽试验,以当地大田土壤为对照,种植辣椒、生菜和油麦菜,探讨广东合水水库淤积物直接农业利用对蔬菜生长、营养元素吸收及品质的影响。结果表明,水库淤积物种植的辣椒、生菜和油麦菜的每盆产量分别为111.25、110.04和115.84g,但均显著低于当地大田土壤种植蔬菜的产量;水库淤积物种植的辣椒果实、生菜和油麦菜植株含水率在78%～82%之间,相对低于当地大田土壤种植的蔬菜含水量;从蔬菜营养元素吸收及品质情况来看,水库淤积物种植的蔬菜氮素吸收量、维生素C含量与大田土壤种植之间差异不明显,而磷、钾、钙和镁元素的吸收量不同程度的低于大田土壤种植,硝酸盐和可溶性糖含量在水库淤积物种植条件下的累积量相对高于大田土壤种植。综合考虑蔬菜产量、养分吸收量和品质情况,合水水库淤积物作为土壤种植蔬菜进行农业资源化利用具有一定的可行性,但要达到当地大田土壤种植条件下的蔬菜产量和更好的蔬菜品质,需要对淤积物进行一定程度的改良后再行利用。

Effects of reservoir sediments of Heshui reservoir on vegetable cultivation in Guangdong Province

Effects of reservoir sediments of Heshui reservoir in Guangdong Province used as soil on growth,nutrients uptake and quality of pepper,lettuce and leaf used lettuce by means of pot experiments in the net room.In the experiments,the local field soil was collected to be control treatments.The results showed that,yields of pepper,lettuce and leaf used lettuce were 111.25,110.04 and 115.84 g for each pot under planting conditions with reservoir sediments, respectively,which were significantly lower than those u...