摘要
试验表明,用中粗砂(<0.5 mm 的颗粒含量为59%)的对照,作物产量高;中砂(<0.5 mm 的颗粒含量达70%)和粗砂(<0.5 mm 的颗粒含量小于34%)处理,产量低于对照的10%以上;珍珠岩加粗砂物理性好,产量接近对照,是较理想的基质;未经发酵的锯末不适于作为基质;颗粒大小组成适当,含物理性粘粒很少的河砂可以不用水洗。
Trial results show that the yield of the cheek plot based on me- dium coarse sand(59% of the partieles<0.5mm)is the highest compared with those on medium(70% of the particles<0.5mm)and coarse(less than 34% of the particles<0.5mm)sand,both of which are more than 10% lower.The good physical property of perlite added coarse sand makes it an appropriate media,with a yield close to the check.River sand of proper particle distribution with a small amount of clay may also be used with- out washing.Unfermented saw dust is not suitable.
