scholarly journals The influence of growth stage on the structure and formation of fungal microbiota in potato root

2020 ◽  
Author(s):  
Yaw Abaye Akosah ◽  
D.S. Pudova ◽  
S.G. Vologin ◽  
A.M. Mardanova
Keyword(s):  
Growth Stage ◽  
Potato Root ◽  
Flowering Stage ◽  
Fungal Microbiota

In the potato root, Fusarium populations greatly increase during the flowering stage of growth. At senescence, a decrease in their share and a significant surge in Monographella spp. is observed.

scholarly journals Efisiensi Penggunaan Cahaya Matahari dan Partisi Karbohidrat Tanaman Sorgum pada Berbagai Tingkat Pemupukan Nitrogen

2018 ◽  
Vol 45 (3) ◽  
pp. 278 ◽  
Author(s):  
Firmansyah Aznur ◽  
Suwarto , ◽  
Dan Heni Purnamawati
Keyword(s):  
Plant Growth ◽  
Growth Stage ◽  
Block Design ◽  
N Fertilization ◽  
Vegetative Stage ◽  
Light Use Efficiency ◽  
Flowering Stage ◽  
Crop Modelling ◽  
Experimental Station ◽  
Use Efficiency

Light use efficiency (LUE) determines biomass production based on interception energy during photosynthesis. The product of photosynthesis is allocated to the plants organs based on the partitioning of carbohydrates. The LUE and carbohydrate partitioning are two important parameters in crop modelling. The research was conducted at Cikabayan experimental station of IPB, Bogor from July to November 2015. The experiment was designed according to a randomize block design with five replications. The fertilizer treatments rate were 0%, 50%, 100%, 150%, and 200% of reference N fertilization of 120 kg ha-1.  The  value  of  light use efficiency and the partition coefficient of sorghum were not affected by N fertilization. The value of light use efficiency is 1.41 g MJ-1. The carbohydrates partitioning was developed based on plant growth stage. The partition from the planting to the emergence stage (0 ≤ s ≤ 0.25) was 0.81 x s/0.25 root, 0 stem, 0.19 x s/0.25 leaves, and 0 panicle. The partition from the emergence to the maximum vegetative stage (0.25 &lt; s ≤ 0.5) was 0.81-(0.59 x s/0.5) root, 0.14 x s/0.5  stem, 0.19 + (0.45 x s/0.5) leaves, and 0 panicle. The partition from the maximum vegetative stage to the flowering stage (0.5 &lt; s ≤ 0.75) was 0.22 - (0.09 x s/0.75) root, 0.14 + (0.39 x s/0.75) stem, 0.64 - (0.46 x s/0.75) leaves, and 0.16 x s/0.75 panicle. The partition from flowering to the harvest stage (0.75 &lt; s ≤ 1) was 0.13 - (0.13 x s) root, 0.53 - (0.52 x s) stem, 0.18-(0.18 x s) leaves, and 0.16 + (0.84 x s) panicle.<br /><br />Keywords: crop modelling, light use efficiency, N fertilizer, partitioning carbohydrates<br /><br />

IMPACT OF SEASON AND HARVEST FREQUENCY ON BIOMASS AND ESSENTIAL OIL YIELDS OF ARTEMISIA HERBA-ALBA CULTIVATED IN SOUTHERN TUNISIA

2009 ◽  
Vol 45 (4) ◽  
pp. 499-508 ◽  
Author(s):  
HEDI MIGHRI ◽  
AHMED AKROUT ◽  
JOSEPH CASANOVA ◽  
FELIX TOMI ◽  
MOHAMED NEFFATI
Keyword(s):  
Essential Oil ◽  
Oil Content ◽  
Growth Stage ◽  
Arid Zone ◽  
Experimental Period ◽  
The Other ◽  
Flowering Stage ◽  
Harvest Frequency ◽  
Dry Biomass ◽  
Essential Oil Yield

SUMMARYArtemisia herba-alba Asso has been successfully cultivated in the Tunisian arid zone. However, information regarding the effects of the harvest frequency on its biomass and essential oil yields is very limited. In this study, the effects of three different frequencies of harvesting the upper half of the A. herba-alba plant tuft were compared. The harvest treatments were: harvesting the same individual plants at the flowering stage annually; harvesting the same individual plants at the full vegetative growth stage annually and harvesting the same individual plants every six months. Statistical analyses indicated that all properties studied were affected by the harvest frequency. Essential oil yield, depended both on the dry biomass and its essential oil content, and was significantly higher from plants harvested annually at the flowering stage than the other two treatments. The composition of the β- and α-thujone-rich oils did not vary throughout the experimental period.

scholarly journals The effect of Achene heteromorphism on progeny traits in the shaggy soldier [Galinsoga ciliata (Rafin) S. F. Blake]

2012 ◽  
Vol 63 (2) ◽  
pp. 51-56 ◽  
Author(s):  
Magdalena Kucewicz ◽  
Ewa Gojło ◽  
Anna Kowalska
Keyword(s):  
Invasive Species ◽  
Life Cycle ◽  
Growth Rates ◽  
Crop Production ◽  
Growth Stage ◽  
Initial Growth ◽  
Annual Plant ◽  
Flowering Stage ◽  
The Individual ◽  
Galinsoga Ciliata

The shaggy soldier [<i>Galinsoga ciliata</i> (Rafin) S. F. Blake], family Asteraceae] is an invasive species that poses a growing threat to crop production. This annual plant produces heteromorphic achenes in a capitulum type inflorescence. The objective of this study was to compare selected morphological and phenological parameters and the success of generative reproduction in plants developed from peripheral and central achenes of the capitulum. The somatic variability of <i>G. ciliata</i> diaspores contributed to differences in the growth rates, development and fertility of the resulting populations. The progeny of central diaspores developed at a slower rate than the individuals derived from peripheral achenes, but at the end of their life cycle, the offspring of dimorphic achenes formed homogenous groups as regards height values. On average, the initial phenophases of <i>G. ciliata</i> plants derived from central achenes began one day later, and they entered the flowering stage eight days later than the individuals developed from peripheral seeds. At the initial growth stage (experimental day 65 to 83), the progeny of central achenes produced fewer capitula. On day 133, the individual fertility of the plants derived from central diaspores was 10% higher on average in comparison with the offspring of peripheral achenes.

Common Waterplantain,Alisma plantago-aquatica, Control in Wild Rice,Zizania palustris, with MCPA and 2,4-D

1988 ◽  
Vol 2 (3) ◽  
pp. 310-316 ◽  
Author(s):  
Joel K. Ransom ◽  
Ervin A. Oelke
Keyword(s):  
Wild Rice ◽  
Growth Stage ◽  
Field Experiments ◽  
Rice Yield ◽  
Leaf Growth ◽  
Application Time ◽  
Flowering Stage ◽  
Leaf Stage ◽  
Late Season ◽  
Treatment Stage

Field experiments were conducted to evaluate the effect of application time on common waterplantain control in wild rice with MCPA and 2,4-D. Common waterplantain control was greatest when MCPA or 2,4-D were applied at 1.1 or 1.7 kg ai/ha at the two-aerial leaf stage. The best late-season control was MCPA applied at the scape elongation growth stage. Common waterplantain was controlled adequately when 0.6 to 0.8 kg/ha of MCPA were applied at the scape elongation or early flowering stage. However, because of common water plantain interference and sensitivity of wild rice to late herbicide applications, the best treatment stage for wild rice yield was when MCPA was applied at 0.6 kg/ha to common waterplantain at the two-aerial leaf stage. Wild rice at this time is at the more tolerant one-aerial leaf growth stage.

Factors Influencing Postemergence Activity of Chloramben in Velvetleaf (Abutilon theophrasti)

Weed Science ◽  
1987 ◽  
Vol 35 (6) ◽  
pp. 853-857 ◽  
Author(s):  
Wendel B. Orr ◽  
Chaudhry A. Ozair ◽  
Loren J. Moshier
Keyword(s):  
Growth Stage ◽  
Field Experiments ◽  
Dry Weight ◽  
Abutilon Theophrasti ◽  
Growth Stages ◽  
Flowering Stage ◽  
Capsule Production ◽  
Second Year ◽  
One Year ◽  
Origin Of Oil

Efficacy of soil and/or foliage applications of the sodium salt of chloramben (3-amino-2,5-dichlorobenzoic acid) was compared, and the influence of growth stage and oil base within adjuvants on chloramben efficacy was evaluated on velvetleaf (Abutilon theophrastiMedic. # ABUTH). In greenhouse experiments, soil applications reduced growth of velvetleaf treated at the six- to seven-leaf stage (15-cm height) more than did foliage applications. Simulated rainfall applied 48 h after chloramben was applied to foliage significantly increased chloramben activity. Chloramben plus an oil concentrate applied at 3.4 kg ae/ha plus 2.3 L/ha reduced fresh and dry weight less as growth stage advanced in both greenhouse and field experiments. Origin of oil present in the oil concentrate did not influence the activity of chloramben plus oil concentrate in either the greenhouse or in the field. Chloramben plus oil concentrate reduced seed capsule (boll) production 70% or more in velvetleaf plants treated at each of three growth stages in one year and reduced capsule production 90, 90, and 28% in plants treated at early vegetative, late vegetative, and flowering stages, respectively, in the second year. Viability of seed was less from plants treated at a vegetative stage compared to the flowering stage.

scholarly journals Effects of Different Growth Stages of Amaranth Silage on the Rumen Degradation of Dairy Cows

Animals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 793 ◽  
Author(s):  
Jian Ma ◽  
Guoqing Sun ◽  
Ali Mujtaba Shah ◽  
Xue Fan ◽  
Shengli Li ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Growth Stage ◽  
Optimal Growth ◽  
Neutral Detergent Fiber ◽  
Growth Stages ◽  
Flowering Stage ◽  
Amaranthus Hypochondriacus ◽  
Rumen Degradation ◽  
Growing Period ◽  
Heading Stage

The purpose of this study was to investigate the rumen degradation characteristic of amaranth silage (Amaranthus hypochondriacus) including four kinds of growing stages (budding stage (BS), 50 d after planting (DAP); early flowering stage (ES), 58 DAP; peak flowering stage (PS), 70 DAP; heading stage (HS), 90 DAP). Four Holstein dairy cows with permanent ruminal cannulas were used as experimental animals. Nylon-bag method was used to assess the ruminal degradability of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), and acid detergent fiber (ADF). The results showed that the concentration of DM in HS was significantly higher than other stages (p < 0.05), whereas the contents of CP, were lower than in other stages (p < 0.05). With the extension of the growing period, the DM effective degradability of amaranth silage decreased gradually, and the difference was significant (p < 0.05). The ruminal CP degradation of 72 h was more than 80%, and compared with ES and HS, the degradation rate of BS and PS was significantly increased (p < 0.05). Compared to BS, the effective degradability of CP was increased (p < 0.05) in ES and HS. For ruminal NDF degradability, the effective degradability of HS was minimum, and it had a noticeable difference with BS and ES (p < 0.05). Thus, the different quality of amaranth growth stage including chemical contents and rumen degradation should be taken into consideration when making amaranth silage. In the present study, the optimal growth stage of amaranth was from the peak flowering stage to heading stage for ensiling.

Observations oh Nucleation and Growth of Voids in Nickel

1970 ◽  
Vol 28 ◽  
pp. 414-415
Author(s):  
J. L. Brimhall ◽  
H. E. Kissinger ◽  
B. Mastel
Keyword(s):  
High Purity ◽  
Growth Stage ◽  
Elevated Temperatures ◽  
Early Growth ◽  
Nucleation And Growth ◽  
Pure Nickel ◽  
Different Temperatures ◽  
Total Fluence ◽  
Neutron Exposure ◽  
Growth Of Voids

Some information on the size and density of voids that develop in several high purity metals and alloys during irradiation with neutrons at elevated temperatures has been reported as a function of irradiation parameters. An area of particular interest is the nucleation and early growth stage of voids. It is the purpose of this paper to describe the microstructure in high purity nickel after irradiation to a very low but constant neutron exposure at three different temperatures.Annealed specimens of 99-997% pure nickel in the form of foils 75μ thick were irradiated in a capsule to a total fluence of 2.2 × 1019 n/cm2 (E > 1.0 MeV). The capsule consisted of three temperature zones maintained by heaters and monitored by thermocouples at 350, 400, and 450°C, respectively. The temperature was automatically dropped to 60°C while the reactor was down.

Effect of Bio and Organic Fertilizers on Pumpkin's (Cucurbita pepo L.) Leave Content of N, P, and K

2020 ◽  
Vol 10 (1) ◽  
pp. 241-245
Author(s):  
Ammar Hameed Madi ◽  
Jawad A. Kamal Al-Shibani
Keyword(s):  
Cucurbita Pepo ◽  
Sandy Loam ◽  
Block Design ◽  
Organic Fertilizers ◽  
Flowering Stage ◽  
College Of Agriculture ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Loam Soil ◽  
Four Levels

This study was conducted to investigate the effect of bacterial bio-fertilization A. chroococcum and P. putide and four levels of compost (0, 1, 2, 3) tons.h-1 on the leaves content of N.P.K elements. The experiment was carried out in one of the greenhouses of the College of Agriculture - University of Al-Qadisiyah during fall season 2018-2019. It designed in accordance with the Randomized Complete Block Design (RCBD) with three replicates in sandy loam soil. The means of treatments were compared with the least significant difference (LSD) at (5)% probability level. The results present that the treatments of A. chroococcum, P. putide and compost at (3) tons.kg-1 significantly increases the leaves content of K.P.K compared to all other treatments in the flowering stage (4.970, 0.5000, and 4.930) mg.kg-1, respectively. This treatment was followed by the effect of the treatment of A. chroococcum and compost at (3) tons.kg-1, which increases the values of all traits except the leaf content of (P). Bio-fertilizer with P. putide + A. chroococcum significantly increases the leaves' content of P.

Sign in / Sign up

Export Citation Format

Share Document