查看更多>>摘要：The present work is primarily a record for wild plant species grown in Wadi Alkuf valley during 2010-2013 and their traditional uses. The genera and species are arranged alphabetically under each family. The voucher specimens are preserved in KeliedaHerbarium of the Department of Botany, Omar Almukhtar University, Albaida, Libya. There are 365 species of flowering plants represented by 257 genera and 75 families besides gymnosperms and pteridophytes found in the region of Wadi Alkuf of Al-Jabal Al-Akhder, Libya. The valley is fairly rich where it harbors 29 endemic taxa. Retama monosperma (L.) Boiss. ssp. bovei (Spach) Maire and Sanguisorba minor Scop. ssp. verrucosa (Link & G.Don) Holmboe are considered as new records in the region.
查看更多>>摘要：An agronomic investigation to study the efficacy of different pre and post emergence herbicides and their combinations to control the weeds in soybean was conducted at the Agronomy Farm of Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola in randomizedblock design with eight treatments and three replications during kharif season of the year- 2012. Application of Imazethapyr @ 0.100 kg a.i./ha + Quizalofop ethyl @ 0.075 kg a.i/ha as PoE was found to be more efficient to control monocot and dicot weedsin soybean which recorded lowest weed density, dry matter and weed index. It also found superior in respect of various growth and yield attributes (viz. plant height, dry matter, number of pods per plant, 100 seed weight and seed yield per plant). The highest seed yield(24.46 q/ha) and straw yield of soybean and maximum gross return (Rs 81500/-) and net return (Rs 56269/-) were also recorded in Imazethapyr @ 0.100 kg a.i./ha + Quizalofop ethyl @ 0.075 kg a.i/ha as PoE with highest B:C ratio of 3.23. Itwas also found responsible for highest uptake of N, P and K by soybean crop and lowest uptake of these plant nutrients by weed plants.
Ali HajiaghaeiMajid RashidiMohammadAmel SadeghiMohammad Gholami...
5页
查看更多>>摘要：Soil infiltration rate is often determined using difficult and time consuming field tests, but it may be more suitable and economical to develop a method which predicts soil infiltration rate based on easily available physical properties of soil. Therefore, a relation between soil infiltration rate and some physical properties of soil is needed. In this study, for predicting soil infiltration rate (IN) based on silt content (SI) and clay content (CL) of soil, a two-variable linear regression model was suggested. The statistical results of study indicated that in order to predict soil infiltration rate based on silt content and clay content of soil the two-variable linear regression model IN = 37.87 - 0.315 SI - 0.527 CL with R~2 = 0.9042 can be strongly recommended.
Enilson L. S. de SdAdriana GiongoBenjamin Dias Osdrio FilhoKelsey A. Gano...
12页
查看更多>>摘要：In lowland areas rhizobia can fix nitrogen in legume association and colonize the rice plants in rotation. Recent studies have shown that rhizobia can promote plant growth by colonizing rice roots, stems and leaves. The production of phytohormones, mainly indole acetic acid (IAA) is possibly the main mechanism of growth promotion of rice by rhizobia. The objectives of this study were to check the responsiveness of different rice cultivars to inoculate with rhizobia; to study the colonization patternof rice plants by rhizobia and legumes; and to genetically evaluate the biosynthesis of auxin by rhizobia. Several experiments were conducted in the greenhouse and in the laboratory with rice plants inoculated with different rhizobia. The rice cultivarstested IRGA424 proved to be more responsive to inoculation with rhizobia. Rhizobial strains marked with the gusA gene confirmed the colonization of rice. The rhizobia tested are able to produce IAA and there is evidence that the biosynthesis occurs by the route of indole-3- acetonitrile (IAN).
查看更多>>摘要：A highly efficient procedure for the synthesis of 3-Cyano-2(lH)-pyridones and their 2-imino isosteres via a one-pot multicomponent reaction of 3,4-dimethoxyacetophenone, malonitrile or ethyl cyanoacetate, an aldehyde, ammonium acetate in the presenceof nano-TiO_2 is achieved in good yields.
查看更多>>摘要：The present study deals with the implication of invasive plant species on the diversity of Boluvampatti forest range in Southern Western Ghats of Tamil Nadu, India. A total number of 90 invasive alien species under 74 genera belonging to 37 families have been recorded based on field exploration and literature consultations. Among these, 53 species are being used by local inhabitants who residing in this forest range for medicinal purposes. It is evident from the study that, 13 species have been introduced intentionally, while the remaining species established unintentionally through trade. The present study concluded that, a better planning is needed for early detection to control and reporting of infestations of spread of naturalized species to bescrutinized.
查看更多>>摘要：Mass scale industrial development lead to urbanizations which is thought to be a major problems of air, water and soil pollution ultimately retard the life standards as well as socio-economics of the country. Keeping in view these environmental degrading facts, the present study was designed to evaluate the quality of sewage effluents and canal water used for irrigation purpose. For this purpose, two sampling sites, i.e. study site 1 (Village Bindra) and study site 2 (Jhangiwala), were selected to collect the water samples for analyzing the irrigation water quality through physical characters, cation & anion (rneql-1) concentrations and four heavy metals (ppm). According to the results the chemical quality of sewage effluent with respect to EC, SAR,RSC, cations and anions was not satisfactory. The concentration of heavy metals i.e., Pb and Hg was above the NEQS directed permissible limit for sewage effluent being used for irrigation purpose, while Ni and As were found in the safe limits. Concentration of heavy metals in canal water were also not satisfactory, as all the samples contained heavy metals above the safe limits set for ideal water use for irrigation purpose. In conclusion it is recommend to control the industrial discharge program to check the excessive amounts of different salts including heavy metals to the agricultural fields.
查看更多>>摘要：Two field experiments were undertaken in the late wet season of 2011 and 2012 at the Teaching and Research Farm of the Federal University of Agriculture, Abeokuta to evaluate ten improved short duration cowpea cultivars. The work aimed at assessing the productivity of ten short duration cowpea cultivars in the rainforest transitory zone of Nigeria. The experiment was laid out in randomized complete block design (RCBD) with three replications. The evaluation was based on the agronomic growth, yield and yield components of the cowpea cultivars. The results indicated that IT99K - 529 - 2 significantly had the shortest days-to-50% flowering (46 day) and days-to-95% maturity in 2012 (65 days). Also IT99K - 494 - 6, IT99K - 529 - 2, IT98K -573-2- 1, IT04K-332 - 1 and 1T06K-242 -3 cowpea cultivars proved significantly (P<0.05) superior to the local check (Ife Brown) in 100 seed weight, pod/plant, seed/pod, total pod and seed weight. Better seed weight per pod was observed among the cultivars as IT99K - 494 - 6 and IT99K - 529 - 2 had 36.8 and 30.1 % better seed weight over Ife Brown.
查看更多>>摘要：A research trial was conducted to examine the comparative efficacy of organic and inorganic sources of nitrogen fertilizers alone and in different combinations on the yield and quality contributing parameters of forage maize (Zea mays L.) during 2012.The experiment was laid out in randomized complete block design (RCBD) with three replications. The maximum green forage yield (47.51 t ha~(-1)), dry matter yield (10.361 ha~(-1)) and crude protein (8.63 %) were recorded in case of T, (100 % recommendeddose of nitrogen from urea) which were statistically at par with T_5 (75 % nitrogen from urea + 25 % nitrogen from poultry manure). This indicated that inorganic source of nitrogen also responded well for maximum growth and quality parameters. Results indicated that application of inorganic fertilizer alone and in combination with organic manure (75 % nitrogen from urea + 25 % nitrogen from poultry manure) have a significantly greater influence than other treatments.
Alfred O. UbaluaCarol I. IhezieAhamefula I. Ikpeama
9页
查看更多>>摘要：Murashige and Skoog basal media gelled with agar, gelrite and different cassava starches, supplemented with 30g/l sucrose were investigated for regeneration and in vitro propagation of sweet potato plantlets. Highest shoot height, leaves and node increases of 10.7±2.5 cm, 15.5±1.4 and 14.5=1=1.6 were obtained from TMS 98/0505, TMS 92/0057 and TMS 92/00057 newly processed starch-gelled media compared to 13.6±2.7 cm, 19±2.1 and 17.7±2.0 from gelrite-gelled media after 8 weeks of culture. After 3 years of storage, TMS 30572 and TMS 98/0505 starch-gelled media improved dramatically in enhancing regeneration and propagation. Consequently, TMS 30572 starch-gelled medium improved from 4.2±0.04 to 13.1 ±2.4 cm shoot height, 6.6±0.6 tol3.8±4.8 and 6.1±0.5 to 13.0=1=3.5 for leaves and nodes respectively. Similar increases were also obtained from TMS 98/0505 starch-gelled medium with shoot height increase of 10.7=1=1.5 to 15.0±2.2 cm, 13.8±5.5 to 15.7±6.6 and 12.9=1=1.8 to 14.7=1=5.7 for leaf andnode growth respectively. Although TMS 98/0505 starch-gelled medium performed better than the controls with 15.0±2.2 cm in shoot height increase after storage, gelrite and agar-gelled media proved to be the most efficient for in vitro regeneration andmultiplication.
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