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Harvest Time and Cultivar Effects on Growth, Physiological Traits, Yield and Quality of Alfalfa in Saline Condition
International Journal of Plant Production ( IF 2.5 ) Pub Date : 2020-03-06 , DOI: 10.1007/s42106-020-00096-3
Hassan Monirifar , Arezoo Mirmozaffari Roudsari , Saeid Ghassemi , Alireza Tavasolee

One of the most important forage crops in Iran is Alfalfa ( Medicago sativa L.). Cultivar selection is important for alfalfa hay production. This research was carried out in 2017 and 2018 to assess the effects of harvest time and cultivar on growth, physiological traits and yield of alfalfa in saline condition. These field experiments were carried out at the Research Farm of East-Azarbaijan Agricultural and Natural Resources Research and Education Center, Tabriz, Iran (Firuz Salar village located 4 km from Azarshahr city). Results showed that the synthetic cultivars (C 2 and C 3 ) and especially C 4 (Azar cultivar) has the highest forage yield and it attributed to high chlorophyll content, catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) activities, proline content, leaf area index (LAI), stem diameter, plant height and leaf to shoot ratio in these cultivars. However, the highest malondialdehyde (MDA) content related to C 1 cultivar (Gara-Yonjeh as a local cultivar). Maximum of fresh and dry forage yields were achieved in second and third harvest times and it have related to high chlorophyll content, enzyme activities (CAT, POD and SOD), LAI, stem diameter, plant height, leaf to shoot ratio, proline and MDA contents in these harvest times. The highest acid detergent fiber (ADF), neutral detergent fiber (NDF), protein content and digestibility were obtained from C 4 followed by C 3 , C 2 and C 1 cultivars. Value of ADF, NDF, protein content and digestibility were more during early harvests (H 1 and H 2 ) than during last harvests (H 3 and H 4 ). These findings have shown that suitable harvesting time of forage alfalfa is second stage for high yield and first stage for high quality. Synthetic cultivars and especially Azar cultivar was a superior cultivar. Thus, harvest time and cultivar selections can influence the yield and quality of alfalfa.

中文翻译:

收获时间和品种对盐渍苜蓿生长、生理性状、产量和品质的影响

伊朗最重要的饲料作物之一是苜蓿(Medicago sativa L.)。品种选择对于苜蓿干草生产很重要。该研究于 2017 年和 2018 年进行,旨在评估收获时间和品种对盐渍条件下苜蓿生长、生理性状和产量的影响。这些田间试验是在伊朗大不里士的东阿扎拜疆农业和自然资源研究和教育中心的研究农场(距离阿扎尔沙赫尔市 4 公里的 Firuz Salar 村)进行的。结果表明,合成品种(C 2 和C 3 )尤其是C 4(Azar 品种)的牧草产量最高,这归因于高叶绿素含量、过氧化氢酶(CAT)、过氧化物酶(POD)和超氧化物歧化酶(SOD)活性, 脯氨酸含量, 叶面积指数 (LAI), 茎粗, 这些品种的株高和叶梢比。然而,最高的丙二醛 (MDA) 含量与 C 1 品种(Gara-Yonjeh 作为当地品种)有关。新鲜和干草产量在第二次和第三次收获时达到最高,这与高叶绿素含量、酶活性(CAT、POD 和 SOD)、LAI、茎直径、株高、叶梢比、脯氨酸和 MDA 相关这些收获时期的内容。从 C 4 获得最高的酸性洗涤纤维 (ADF)、中性洗涤纤维 (NDF)、蛋白质含量和消化率,其次是 C 3 、C 2 和 C 1 品种。ADF、NDF、蛋白质含量和消化率在早期收获期间(H 1 和H 2 )的值高于在最后一次收获期间(H 3 和H 4 )。这些研究结果表明,牧草苜蓿适宜的收获时间是高产的第二阶段和优质的第一阶段。合成品种,尤其是 Azar 品种是优良品种。因此,收获时间和品种选择会影响苜蓿的产量和质量。
更新日期:2020-03-06
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