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Abstract The regeneration characteristics and regeneration quality of the Pennisetum americamum ‘23A’× P. purpureum‘N51’‘Huanan No. 1’was studied after mowting, the P. ‘23A’× P. purpureum‘N51’‘Huanan No. 1’of second year was used as a test material,the regeneration speed, regeneration grass yield, regeneration rate, regeneration intensity and regeneration quality of the strain were studied. The results showed that: (1) Mowing in November, the regenerated grass of first harvesting could be harvested in April of the following year. With the increase of temperature and rainfall, the rate of plant regeneration accelerated, but the high temperature and drought reduced the number of reproductive tillers, the lowest tillers were 38 per bush in August, and the highest tillers were 58 per bush at the end of May, which was significantly higher than other treatments (P<0.05); (2)the number of mowing increased, regeneration intensity, regeneration rate, and regenerated grass yield barley significantly decreased in the later period,the harvested dry matter yield of regenerated grass in the May was the highest (40.0 t/hm2), accounting for 47.6% of the annual year. The crude protein content was the highest 9.29% in May,and the lowest 7.04% in October, but the yield of crude protein in October was 151.4 kg/hm2 higher than that in April. The regeneration characteristics of the Pennisetum americamum ‘23A’× P. purpureum‘N51’‘Huanan No. 1’ was greatly affected by temperature and water conditions, it was beneficial to improve the yield and quality of the grass by strengthening the management of water and fertilizer in the field after mowing and adding water properly during drought.
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2020, Vol. 33 
