Relationships between botanical composition,yield and forage quality of permanent grasslands over the first growth cycle          下载免费PDF全文

D. Andueza  A. M. Rodrigues  F. Picard  N. Rossignol  R. Baumont  U. Cecato  A. Farruggia 《Grass and Forage Science》2016,71(3):366-378

This study examined the relationships between botanical composition and forage parameters (yield and forage quality variables) in 153 permanent grasslands located in the Massif Central of France. Grasslands were sampled at two vegetation stages in the first growth cycle. Botanical composition, yield, ash, crude protein, neutral detergent fibre, acid detergent fibre, acid detergent lignin, organic matter digestibility (OMD) and voluntary intake (VI) were estimated for each sample. Temporal variability in species–forage parameter relationships were accounted for using innovative multivariate analyses applied mainly in ecological science. Crude protein and OMD were weakly correlated when each harvest time was analysed separately. Species–forage parameter relationships remained stable during the first growth cycle. The stability of these relationships indicates that permanent grasslands dominated by competitive species were associated with high yield and forage quality values whereas permanent grasslands composed of conservative species and/or high proportions of senescent material were associated with high structural carbohydrate values and low yield, OMD and VI values. Based on these relationships, we propose a typology of permanent grasslands along with a set of indicator species enabling non‐specialist botanists to easily classify grasslands for grassland management purposes.  相似文献   

Comparison of Phytochemicals and Antioxidant Capacity in Three Bean Varieties Grown in Central Malawi     

Gong-Jian Fan  Victoria U. Ndolo  Mangani Katundu  Rachel Bezner Kerr  Susan Arntfield  Trust Beta 《Plant foods for human nutrition (Dordrecht, Netherlands)》2016,71(2):204-210

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Agroforestry research and extension education at 1890 universities and its impact in the Southeast     

U. Karki  J. Idassi  S. R. Mentreddy  N. Gurung  L. Karki  S. Bambo  C. Christian 《Agroforestry Systems》2016,90(5):715-722

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Effect of hygrothermal treatment on wood properties: color changes and kinetic analysis using four softwood and seven hardwood species     

Miyuki U. Matsuo  Katsuya Mitsui  Isao Kobayashi  Mitsuhiro Kohara  Masato Yoshida  Hiroyuki Yamamoto 《Wood Science and Technology》2016,50(6):1145-1160

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两个谷子CIPK基因在非生物逆境胁迫下的表达分析   总被引：2，自引：0，他引：2  

余爱丽  赵晋锋  王高鸿  杜艳伟  李颜方  张正  郭二虎  梁爱华 《作物学报》2016,42(2):295-302

CIPK是一类丝氨酸/苏氨酸蛋白激酶,该蛋白在植物响应逆境胁迫过程中发挥重要作用。本文利用生物信息学方法从谷子基因组中鉴定出2个CIPK基因, 命名为SiCIPK6和SiCIPK16。序列分析表明SiCIPK6基因组序列长1994 bp,编码451个氨基酸;SiCIPK16基因组序列长1885 bp,编码473个氨基酸,2个基因均无内含子和可变剪切。生物信息学分析显示这2个基因在蛋白质序列和结构上与其他物种CIPK基因一样非常保守。实时定量PCR分析表明SiCIPK6和SiCIPK16在ABA、低温、高温、干旱、高盐诱导下表达量均有所上调, SiCIPK6基因在ABA、干旱和盐处理时表达量上调幅度较大,而SiCIPK16基因在低温、干旱和高温处理时表达量上调幅度较大。半定量PCR检测结果表明SiCIPK6和SiCIPK16两个基因在拔节、孕穗、灌浆期时均有表达,在相应生育时期受到干旱胁迫时它们表达量均有所提高。推测SiCIPK6和SiCIPK16基因在谷子的干旱或其他逆境胁迫中起一定作用。  相似文献   

Expansion of female sex organs in response to prolonged virginity in Cannabis sativa (marijuana)     

Ernest Small  Steve G. U. Naraine 《Genetic Resources and Crop Evolution》2016,63(2):339-348

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Size matters: evolution of large drug-secreting resin glands in elite pharmaceutical strains of Cannabis sativa (marijuana)     

Ernest Small  Steve G. U. Naraine 《Genetic Resources and Crop Evolution》2016,63(2):349-359

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Genetic and phenotypic diversity within the Fusarium graminearum species complex in Norway     

Aamot  H. U.  Ward  T. J.  Brodal  G.  Vrålstad  T.  Larsen  G. B.  Klemsdal  S. S.  Elameen  A.  Uhlig  S.  Hofgaard  I. S. 《European journal of plant pathology / European Foundation for Plant Pathology》2015,142(3):501-519

European Journal of Plant Pathology - As has been observed in several European countries, the frequency of Fusarium head blight (FHB) caused by members of the Fusarium graminearum species complex...  相似文献   

Effects of water exchange protocols on water quality,sedimentation rate and production performance of Penaeus monodon in earthen ponds          下载免费PDF全文

Rajeeb K Mohanty  Atmaram Mishra  Dileep K Panda  Dhiraj U Patil 《Aquaculture Research》2015,46(10):2457-2468

This study was carried out in farmers' fields to quantify the total water and consumptive water use in grow‐out culture of Penaeus monodon under recommended package of practice with two different water management protocols: T₁, with no water exchange and T₂, with regulated water exchange. Treatment‐wise estimated total water use, was 2.09 and 2.43 ha‐m 122 day^?1, while the computed consumptive water use index (m³ kg^?1 biomass) was 5.35 and 6.02 in T₁ and T₂ respectively. Lower rates of water exchange (T₂) showed significantly improved (P < 0.05) crop performance in terms of performance index (19.75 ± 0.75), production‐size index (74.1 ± 3.4), survival rate (80.13 ± 1.7%) and productivity (2.44 ± 0.08 t) over the zero water exchange. The shrimp pond water quality suitability index (WQSI) infers that regulated water exchange (T₂) improved the overall suitability of water quality for shrimp culture. WQSI up to 90 days of culture ranged between 7.5–9.0 in T₂, needs little management while in the last month of rearing, it was good with moderate management requirements. Treatment‐wise sediment load ranged between 50.4–56.3 m³ t^?1 shrimp biomass. High intensity of water exchange and low apparent feed conversion ratio influenced in lowering the sedimentation rate. Regulated water exchange protocol (T₂) performed well (higher net total water productivity and net consumptive water productivity) against no water exchange (T₁). A higher OV:CC ratio (ratio of the output value to the cost of cultivation) indicated that T₂ had a distinct edge over the T₁ protocol.  相似文献   

Comparative Study on Growth Performance of Transgenic(Over-Expressed OsNHX1) and Wild-Type Nipponbare under Different Salinity Regimes     

Kahrani Ishak Nurul  Sulaiman Zohrah  U. Tennakoon Kushan 《水稻科学》2015,22(6):275

Transgenic Nipponbare which over-expressed a Na+/H+ antiporter gene OsNHX1 was used to compare its growth performance, water status and photosynthetic efficiency with its wild type under varying salinity regimes. Chlorophyll content, quantum yield and photosynthetic rate were measured to assess the impact of salinity stress on photosynthetic efficiency for transgenic and wild-type Nipponbare. Effects of salinity on water status and gas exchange to both lines were studied by measuring water use efficiency, instantaneous transpiration rate and stomatal conductance. Dry shoot weight and leaf area were determined after three months of growth to assess the impacts of salinity on the growth of those two lines. Our study showed that both lines were affected by salinity stress, however, the transgenic line showed higher photosynthetic efficiency, better utilization of water, and better growth due to low transpiration rate and stomatal conductance. Reduction of photosynthetic efficiency exhibited by the wild-type Nipponbare was correlated to its poor growth under salinity stress.  相似文献