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于水蕹菜生长旺盛的8月份定期抽样测定了两个精养池塘(1号池和2号池)水蕹菜在第一次收割后的株重、整株长、新生芽数、最长芽的长度及其周长。结果表明:8月份1号池和2号池水蕹菜每株日增重平均值分别为:0.74g.d-1和0.72g.d-1,平均每日每株整株高分别增加0.32 cm.d-1和0.25 cm.d-1,平均每株每天新生芽数分别为0.38个和0.28个,而平均每天每株最长芽的芽长分别增加0.69 cm.d-1、0.66 cm.d-1,芽周长分别增加0.12 cm.d-1、0.12 cm.d-1。同时,对两个池塘氮磷浓度进行测定,找出氮磷浓度和水蕹菜生长之间的关系;结果发现,尽管两个池塘氮磷浓度有差异,但其对两个池塘水蕹菜生长速度几乎没有影响。这说明当营养物质水平处于水蕹菜生长时可耐受的限度之内时,其浓度的高低对水蕹菜生长速度的影响较小。
In August, a regular sampling of water spinach was made to determine the plant weight, whole plant length, number of new shoots and the longest number of water spinach after the first harvest in two intensive ponds (pool 1 and pool 2) Bud length and its circumference. The results showed that the daily average weight gain per day for the first and the second ponds in August was 0.74gd-1 and 0.72gd-1, respectively. The average daily plant height increased by 0.32 cm.d-1 And 0.25 cm.d-1 respectively. The average numbers of new shoots per plant per day were 0.38 and 0.28, while the average bud length per plant per day increased by 0.69 cm.d-1 and 0.66 cm-1, respectively, Bud circumference increased by 0.12 cm.d-1 and 0.12 cm.d-1, respectively. At the same time, the concentration of nitrogen and phosphorus in the two ponds was measured to find out the relationship between the concentration of nitrogen and phosphorus and the growth of water spinach. The results showed that although the concentrations of nitrogen and phosphorus in the two ponds were different, Speed has almost no effect. This shows that when the level of nutrients is within the limit of the growth of water spinach, its concentration has little effect on the growth rate of water spinach.