棕榈科刺葵属5种植物热值的月变化研究(英文)

Abstract

对棕榈科刺葵属 5种植物叶的热值和灰分含量的月变化进行了研究。结果表明 :( 1 )大刺葵( 7 2 5 %～ 1 0 3 9% )、加拿利海枣 ( 7 1 2 %～ 1 0 0 9% )和伊拉克蜜枣 ( 7 0 1 %～ 1 0 0 0 % )的灰分含量相近 ,经t检验 ,无显著差异 (P >0 0 5 ) ;加拿利海枣、伊拉克蜜枣和大刺葵的灰分含量高于江边刺葵 ( 6 2 0 %～ 8 93 % ) (P<0 0 5 )和林刺葵 ( 3 5 9%～ 6 94% ) (P <0 0 0 0 1 )。 ( 2 ) 5种植物干重热值的月变化趋势有些差异 ,江边刺葵( 2 0 2 4～ 2 1 93kJ·g- 1 )与伊拉克蜜枣 ( 1 9 68～ 2 1 82kJ·g- 1 )的干重热值相近 (P >0 0 5 ) ;林刺葵 ( 1 8 5 1～2 1 5 1kJ·g- 1 )、大刺葵 ( 1 8 40～ 2 0 5 6kJ·g- 1 )与加拿利海枣 ( 1 9 1 3～ 2 0 79kJ·g- 1 )的干重热值接近 (P >0 0 5 ) ;江边刺葵和伊拉克蜜枣的干重热值高于林刺葵 (P <0 0 5 )、加拿利海枣 (P <0 0 0 5 )和大刺葵 (P <0 0 0 0 5 )。( 3 )林刺葵的干重热值与灰分含量具有显著的线性相关 ;伊拉克蜜枣、林刺葵、大刺葵 3种植物的干重热值与降雨量有显著线性相关 (P <0 0 5 )。 ( 4 )去灰分热值的月变化趋势因种而异 ,去灰分热值与干重热值的月变化趋势不同 ,灰分含量是造成差异的原因。Monthly changes in the ash contents and caloric values of the leaves of 5 Phoenix species in Palmae were discussed. The results showed as follows:(1)The range of ash contents of P. paludosa(7.25%～10.39%), P. canariensis(7.12%～10.09%)and P. dactylifera(7.01%～10.00%)was similar, and the differences were not significant by t test (P>0.05). P. canariensis, P. dactylifera and P. paludosa had the higher ash contents than P. roebelenii(6.20%～8.93%)(P<0.05)and P. hanceana(3.59%～6.94%)(P<0.000 1).(2)Seasonal changes in the gross caloric values varied with the species. The range of P. roebelenii (20.24～21.93*!kJ·g -1) was close to P. dactylifera (19.68～21.82*!kJ·g -1), and the differences were not significant by t test (P>0.05). The range of P. hanceana (18.51～21.51*!kJ·g -1), P. paludosa (18.40～20.56*!kJ·g -1) and P. canariensis(19.13～20.79*!kJ·g -1)was similar, and the differences were not significant by t test (P>0.05). P. roebelenii and P. dactylifera had the higher gross caloric values than P. hanceana(P<0.05), P. canariensis(P<0.005)and P. paludosa(P<0.000 5).(3)Gross caloric values were correlated remarkably with ash contents for P. hanceana, and gross caloric values were correlated with monthly rainfall (P<0.05) for P. hanceana, P. paludosa and P. dactylifera, respectively.(4)Seasonal ash-free caloric values varied with species, and seasonal changes in ash-free caloric values were different from that in gross caloric values, resulted from the differences in ash contents.