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首页> 外文期刊>American Journal of Plant Sciences >Studies on Biomass Yield, Morphological Characteristics and Nutritive Quality of Napier Cultivars under Two Different Geo-Topographic Conditions of Bangladesh
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Studies on Biomass Yield, Morphological Characteristics and Nutritive Quality of Napier Cultivars under Two Different Geo-Topographic Conditions of Bangladesh

机译：孟加拉国两种不同地质地质条件下纳米尔品种生物质产量，形态特征及营养品质的研究

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摘要

The aim of the present study was to evaluate the performance of Napier cultivars in terms of forage yield, plant morphology and nutrient contents under two different agro-ecology and geo-topographic conditions. Three Napier cultivars being conserved by Bangladesh Livestock Research Institute (BLRI), namely-BLRI - Napier 1, (BN-1), BLRI - Napier 3 (BN-3) and Merkeron (BN-5) were selected to cultivate in severe drought prone areas (called Barind) and non-drought area at Savar (Modhupur terrace). Stem cuttings were planted in rows apart from 70 cm and 35cm spacing between plants. Data of 6 consecutive harvests from a period of approximately one year were collected and analyzed statistically by “R” software. The results showed that cultivar and location had a significant (P < 0.001) effect on biomass yield, plant height and leaf-stem ratio (LSR), while number of tillers were significantly varied with locations. BN-3 yielded the highest biomass (33.32 t/ha/harvest) at non-drought location (42.98 t/ha/harvest). The highest plant height was obtained in BN-1 (171.2 cm) at non-drought location (174.6 cm). Number of tiller s per hill ranged from 25.4 to 26.3 among cultivars (P > 0.05) and the highest tillers were found at non-drought location (28.1 no). The best LSR was estimated from BN-5 (0.86) at drought location (0.95). The proximate analysis showed that CP, ADF and NDF in whole plant were varied significantly (P < 0.001), being the highest contents in BN-1 (10.69%, 46.20% and 54.58%, respectively). On the other hand, DM and ash contents did not differ significantly (P > 0.05) among cultivars which ranged from 15.80% to 17.13% and 13.10% to 14.58%, respectively. The highest CP content in whole plant was obtained at non-drought location (11.89%), while the lowest ash (10.57%) and NDF (52.71%) contents were obtained at the same location. The highest CP contents in leaf were found at non-drought (15.03%) and the lowest ash (9.86%) at the same location. The highest CP contents (5.90%) in stem were found at non-drought location, while the lowest ash (11.28%) and NDF (54.59%) contents were obtained at the same location. Finally, the experiment reveals the superiority in biomass yield and nutritional quality (in terms of CP content) with the ranking orders of BN-3 > BN-1 > BN-5 and BN-1 > BN-3 > BN-5. Therefore, it may be concluded that BN-1, BN-3 , and BN-5 cultivars were well adapted in both drought and non-drought conditions, although performance showed better in later condition s . However, in terms of forage yield and overall nutrient composition, the performance of BN-3 was the best irrespective of locations.
机译：本研究的目的是评估纳米尔品种在两种不同农业生态和地质地形条件下的饲料产量，植物形态和营养物质方面的性能。孟加拉国畜牧业研究所（Blri）保守三个Napier品种，选择了纳米尔 - 纳皮尔1，（BN-1），Blri - Napier 3（BN-3）和Merkeron（BN-5），以培养严重干旱在萨马尔（Modhupur Terrace）的俯卧区（称为Barind）和非干旱区。茎扦插以70cm和35cm之间的植物间隔种植。通过“R”软件在统计上收集和分析6个连续收获的数据。结果表明，品种对生物质产量，植物高度和叶茎比（LSR）具有显着（P <0.001）的影响，而分蘖数量随着位置而显着变化。 BN-3在非干旱地点（42.98吨/小时/收获）产生最高的生物量（33.32吨/哈/收获）。在非干旱位置（174.6cm），在BN-1（171.2厘米）中获得最高植物高度。耕地数量的距离为25.4至26.3种，在栽培品种（p> 0.05）中，最高分蘖在非干旱位置（28.1号）发现。最佳LSR在干旱位置（0.95）的BN-5（0.86）估计。近似分析表明，全植物中的CP，ADF和NDF显着变化（P <0.001），是BN-1中最高的含量（分别为10.69％，46.20％和54.58％）。另一方面，DM和灰分含量在品种中没有显着差异（p> 0.05），分别为15.80％至17.13％和13.10％至14.58％。在非干旱位置（11.89％）获得全植物中的最高CP含量，而在同一位置获得最低灰分（10.57％）和NDF（52.71％）含量。在同一位置的非干旱（15.03％）和最低灰分（9.86％）处发现叶中最高CP内容物。在非干旱位置发现茎中最高的CP含量（5.90％），而在同一位置获得最低灰分（11.28％）和NDF（54.59％）含量。最后，该实验揭示了生物量产量和营养质量的优越性（在CP含量方面），BN-3> BN-1> BN-5和BN-1> BN-3> BN-5的排名顺序。因此，可以得出结论，BN-1，BN-3和BN-5品种在干旱和无干旱条件下很好地适应，但在以后的情况下表现较好。然而，就饲料产率和总营养成分而言，BN-3的性能是最不重要的。

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