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笔者通过试验研究了不同施肥水平对大力士甜高粱生长发育及产量的影响。结果表明,在尿素和过磷酸钙施用量分别为480kg/hm~2、875kg/hm~2时,对大力士甜高粱株高影响明显,对茎叶比无明显影响;当尿素和过磷酸钙施用量下降到160kg/hm~2、875 kg/hm~2时,对其产量影响显著,对其他处理影响不明显。尿素施用量为390~480 kg,/hm~2时,大力士甜高粱可获得最高产量,分别为128.23 t/hm~2和124.88 t/hm~2,同时经济效益可达到最大;因此,在生产上采用的最佳施肥水平为390~480 kg/hm~2。
The author studied the effects of different fertilization levels on the growth and yield of sweet sorghum of Hercules. The results showed that when the application rates of urea and superphosphate were 480kg / hm ~ 2 and 875kg / hm ~ 2 respectively, the plant height of sweet sorghum had significant effect on the plant height, but had no significant effect on the stem-leaf ratio. When urea and superphosphate When the application rate dropped to 160kg / hm ~ 2,875kg / hm ~ 2, it had a significant effect on the yield and had no obvious effect on other treatments. The highest yield of sweet sorghum was obtained with application rate of 390 ~ 480 kg / hm ~ 2, which was 128.23 t / hm ~ 2 and 124.88 t / hm ~ 2, respectively. At the same time, the economic benefit could reach the maximum The optimum fertilization level for production is 390 ~ 480 kg / hm ~ 2.