Hydro-physical characteristics of selected media used for containerized agriculture systems     

Vivek Kumar  Berrin Tansel  M. Reza Savabi 《Agricultural Water Management》2010,98(2):314-320

Containerized plant production represents an extremely intensive agricultural practice with large amounts of moisture and fertilizer application. Hydro-physical characteristics such as water infiltration, texture and structure, particle size distribution affect the quality of the media used in containerized agricultural systems and the water availability to plants. Water retention characteristics depend on particle size distribution as well as the composition of the media used. Materials with coarser particles allow faster percolation of water and also retain relatively higher amounts moisture per unit weight due to higher porosity, while draining faster due to smaller surface area per unit weight. Faster drainage can result into airflow through coarser materials causing the media to dry. The objectives of this study were to characterize the selected hydro-physical properties of plant growth media that are commonly used by nurseries in South Florida. Characterization of the plant growing media can allow modeling of soil-water interactions and development of best management practices for more efficient use of water and agrochemicals by nurseries. Experimental analyses were performed to characterize the plant growth mixtures in terms of particle size distribution and hydraulic conductivity using three different methods (i.e., constant head permeability, falling head permeability test, and tension infiltrometer test). The saturated hydraulic conductivity of the mixtures measured by constant head method ranged from 0.029 to 0.042 cm/s (104-151 cm/h) and by falling head method ranged from 0.078 to 0.112 cm/s (281-403 cm/h). The saturated hydraulic conductivity of the mixtures measured by tension infiltrometer ranged from 0.02 to 0.34 cm/h. Understanding water retention and permeation characteristics of the plant growing media could assist development of best management practices (BMP) for containerized agricultural systems for efficient management of irrigation water and agrochemical use.  相似文献   

Energy balance and crop water stress in winter maize under phenology-based irrigation scheduling     

Gouranga Kar  Ashwani Kumar 《Irrigation Science》2010,28(3):211-220

In eastern India, cultivation of winter maize is getting popular after rainy season rice and farmers practice irrigation scheduling of this crop based on critical phenological stages. In this study, crop water stress index of winter maize at different critical stages wase determined to investigate if phenology-based irrigation scheduling could be optimized further. The components of the energy budget of the crop stand were computed. The stressed and non-stressed base lines were also developed (between canopy temperature and vapor pressure deficit) and with the help of base line equation, [(T _c − T _a) = −1.102 VPD − 3.772], crop water stress index (CWSI) was determined from the canopy-air temperature data collected frequently throughout the growing season. The values of CWSI (varied between 0.42 and 0.67) were noted just before the irrigations were applied at critical phenological stages. The soil moisture depletion was also measured throughout the crop growing period and plotted with CWSI at different stages. Study revealed that at one stage (silking), CWSI was much lower (0.42–0.48) than that of recommended CWSI (0.60) for irrigation scheduling. Therefore, more research is required to further optimize the phenology-based irrigation scheduling of winter maize in the region. This method is being used now by local producers. The intercepted photosynthetically active radiation and normalized difference vegetation index over the canopy of the crop were also measured and were found to correlate better with leaf area index.  相似文献   

Elucidation of zein isoforms associated with high protein quality traits for targeted improvement in maize-based nutrition     

Mehak Sethi  Alla Singh  Monika Garg  Venkatesh Chunduri  Parminder Kumar  Veena Devi  Firoz Hossain  Ramesh K. Phagna  Mamta Gupta  Dharam P. Chaudhary 《Cereal Chemistry》2024,101(2):418-430

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Genome mapping and molecular markers identification for yield,yield component and fibre quality traits in tetraploid cotton     

U. M. Ramesh  Ramesh Methre  N. V. M. Kumar  Ishwarappa S. Katageri  S. Anjan Gowda  Sateesh Adiger  Satish Kumar Yadava  Vijay B. R. Lachagari 《Plant Breeding》2019,138(6):880-896

The identification of quantitative trait loci (QTL) across different environments is a prerequisite for marker‐assisted selection (MAS) in crop improvement programmes. CottonSNP63k Illumina infinium array was used for genotyping 178 inter‐specific recombinant inbred lines and the parents, and identified 1,667 homozygous polymorphic markers between the parents. Of these, 1,430 markers were used for the construction of linkage map after removing 237 redundant markers. The genetic map spans a total genetic length of 3,149.8 cM with an average marker interval size of 2.2 cM. The phenotypic data from five environments were analysed separately using inclusive composite interval mapping which identified a total of 56 QTL explaining phenotypic variances (PVE) in the range of 8.18%–28.91%. There were 11 and 24 major QTL found for fibre quality and yield components, respectively. A total of 64 QTL were identified through Multi‐Environment Trials analysis, of which 34 recorded QTL × Environment interactions.  相似文献   

Lowered vaccine dose for immunisation of calves against tropical theileriosis usingTheileria annulata lymphoblasts     

Grewal  A. S.  Singh  Avtar  Kumar  Sanjay  Kondal  J. K.  Kanwar  J. R.  Kapur  J.  Sawhney  S. M. S. 《Tropical animal health and production》1997,29(4):104S-108S

Tropical Animal Health and Production - Bovine tropical theileriosis is of high incidence in calves below 2 months old in India. TheTheileria cell culture vaccine evolved by the Punjab Agricultural...  相似文献   

Protein Profiling from Hormone-Induced Tetraploid Roots in Platycodon grandiflorum     

Kwon  Soo-Jeong  Roy  Swapan Kumar  Yu  Jang-Hwan  Cho  Seong-Woo  Kim  Hag-Hyun  Boo  Hee-Ock  Woo  Sun-Hee 《Journal of Crop Science and Biotechnology》2019,22(5):465-474

Journal of Crop Science and Biotechnology - The root of Platycodon grandiflorum is used as traditional oriental medicine in Asian countries since ancient times to treat bronchitis, tonsillitis,...  相似文献   

Effects of Nitrogen,Phosphorus and Potassium Fertilizers on Growth Characteristics of Two Species of Bellflower (Platycodon grandiflorum)     

Kwon  Soo-Jeong  Kim  Hye-Rim  Roy  Swapan Kumar  Kim  Hyun-Jung  Boo  Hee-Ock  Woo  Sun-Hee  Kim  Hag-Hyun 《Journal of Crop Science and Biotechnology》2019,22(5):481-487

Journal of Crop Science and Biotechnology - Fertilization plays a vital role to enhance productivity in several medicinal plants, including Bellflower. A pot experiment was conducted in 2018 to...  相似文献   

Influence of Pre-Drying Treatments on Physico-Chemical and Phytochemical Potential of Dried mahua Flowers     

Pinakin  Dave Jaydeep  Kumar  Vikas  Kumar  Satish  Kaur  Sawinder  Prasad  Rasane  Sharma  Basista Rabina 《Plant foods for human nutrition (Dordrecht, Netherlands)》2020,75(4):576-582

Plant Foods for Human Nutrition - Mahua (Madhuca longifolia) flowers are boon for the local tribes of India and have been successfully utilized traditionally for the value addition, and are very...  相似文献   

Potential Inhibitors for SARS-CoV-2 and Functional Food Components as Nutritional Supplement for COVID-19: A Review     

Singh  Pushpendra  Tripathi  Manish Kumar  Yasir  Mohammad  Khare  Ruchi  Tripathi  Manoj Kumar  Shrivastava  Rahul 《Plant foods for human nutrition (Dordrecht, Netherlands)》2020,75(4):458-466

Plant Foods for Human Nutrition - The severe acute respiratory syndrome is a viral respiratory infection and commonly called as COVID-19, caused by severe acute respiratory syndrome coronavirus-2...  相似文献   

Polyphasic phenotypic and genetic analysis reveals clonal nature of Xanthomonas axonopodis pv. punicae causing pomegranate bacterial blight     

A. Kumar  J. Sharma  V. Munjal  K. Sakthivel  S. K. Thalor  K. K. Mondal  S. Chinchure  R. Gharate 《Plant pathology》2020,69(2):347-359

Yellow-pigmented bacteria isolated from blight-affected pomegranate leaves and fruit across seven Indian states in epidemics during the years 2008–2016 were characterized and identified using phenotypic and genotypic tools. All bacterial isolates shared phenotypic traits such as colony morphology, NaCl and pH sensitivity and fuscan production, and caused typical lesions on pomegranate plants upon artificial inoculation. Analysis of 16S ribosomal DNA and 16S–23S rDNA intergenic spacer sequences confirmed their identity as Xanthomonas axonopodis pv. punicae. The new isolates collected after 2000 were compared with an old isolate from the 1950s using polyphasic taxonomic approaches including multilocus sequence analysis (MLSA). Nucleotide polymorphism in 24 isolates for nine genomic loci (dnaK, fyuA, gyrB (Young), gyrB (Almeida), rpoD, fusA, gapA, gltA and lepA) showed minor variations in loci fyuA and gyrB. Isolates were grouped into four nearly identical sequence types, ST1, ST2, ST3 and ST4, based on their allelic profiles, ST3 being widespread in Indian states. Molecular phylogenetic analysis of concatenated 5690 bp with other Xanthomonas pathovars revealed its close genetic similarity with the X. citri group. The blight outbreak in diverse geographical locations is attributed to a re-emerged clonal population of X. axonopodis pv. punicae on a genetically homogenous pomegranate cultivar. The latently infected vegetative planting material of elite pomegranate cultivars contributed to the dissemination of the bacterial inoculum. This study highlights and forewarns of the role played by the clonally propagated elite pomegranate cultivars in disseminating and sustaining clonal populations of this bacterial plant pathogen in many Indian states.  相似文献