scholarly journals Influence of Height of Cane and Leaf Stage at Time of Sampling on Leaf-Nutrient Content of Sugarcane

1969 ◽  
Vol 44 (1) ◽  
pp. 11-15
Author(s):  
G. Samuels ◽  
S. Alers-Alers ◽  
P. Landrau, Jr.
Keyword(s):  
Nutrient Content ◽  
Leaf Nitrogen ◽  
Sampling Time ◽  
Nitrogen And Phosphorus ◽  
Leaf Sample ◽  
Leaf Stage ◽  
Fertilizer Experiment ◽  
Significant Difference ◽  
Leaf Sampling ◽  
Number Of Leaves

Leaf samples of sugarcane were taken from a fertilizer experiment at Río Piedras with varieties B. 41227 and M. 336 to determine whether the height of cane or the number of leaves present at leaf-sampling time influenced the nutrient content of the leaf sample. It was found that: 1. There was no significant difference in leaf nitrogen or potassium from cane tillers aged 3 months with heights of 12, 24, and 36 inches. 2. Variations in cane height at time of sampling did influence leaf-phosphorus values; there were increases in cane height. 3. The number of leaves present at time of sampling (7-13 weeks) did not influence leaf-nutrient values in general, except for nitrogen and phosphorus at 9 weeks of age. Here the trends of this influence with the two varieties studied were contrary.

scholarly journals Effect of Gypsum on Rice Growth in Three Salt- affected Agricultural Soils in the Ho-Keta Plain

2021 ◽  
pp. 213-219
Author(s):  
L. Sackey ◽  
E. Osei ◽  
E. O. Bennoah ◽  
A. Tettey
Keyword(s):  
Plant Height ◽  
Agricultural Soils ◽  
Growth Parameters ◽  
Chemical Constituents ◽  
High Growth ◽  
Core Sample ◽  
Nitrogen And Phosphorus ◽  
Significant Difference ◽  
Number Of Leaves ◽  
Growth Attributes

Aims: To assess the growth attribute of NERRICA- L19 rice in three salt-affected Agricultural soils amended with Gypsum from the Ho- Keta plain in the Volta region, Ghana. Study Design: Complete Randomized Design. Place and Duration of Study: Soil Research Institute, Kwadaso, Kumasi between June 2016 and July 2019. Methodology: Approximately 2.6 kg of the soil samples were taken from three different sites, namely, Anyako, Anyenui and Atiehife and were mixed thoroughly with different rates 0%, 75% and 100% of Gypsum, (CaSO4.2H2O) and filled into thirty six perforated polyvinyl plastic pots. The pots were saturated with water and incubated for 24 h. Twenty-one-day old seedlings of NERRICA- L 19 rice were transplanted into the pots, arranged in a randomized complete design and leached for four weeks. Core sample of the soils from each pot were taken and analyzed at the end of the experiment. Data on growth attributes (plant height, number of leaves and number of tillers) and leave tissue compositions (Ca, Mg, K, Na, P and N) were measured. Results: The study revealed that Gypsum rates at (75 and 100%) increased the growth attributes and tissue concentrations of NERRICA- L 19 rice compared to the control. Growth parameters, such as plant height, number of leaves and tiller for Anyako, Anyenui and Atiehife soils, increased as Gypsum levels increased with significant differences in the height of the plants and the number of plant leaves recorded (P = 0.05).  However there was no significant difference in tillers growth recorded for Atiehife soil, compared to Anyako and Anyenui soils (P = 0.05). The chemical constituents of the leave tissue, showed high composition of calcium and potassium than magnesium, while the composition of sodium decreased. The concentration of calcium, magnesium and potassium increased significantly at (P = 0.05) in Anyako and Atiehife soils with no-significant level in Anyenui soil. The trend was the same for the concentration of sodium. The concentration of nitrogen and phosphorus increased as the level of treatment increased. In respect to P accumulation, the differences were not significant in Atiehife soils, but was significant in Anyako and Anyenui soils. Conclusion: Gypsum application significantly enhanced nutrient uptake and increased the growth attributes of NERRICA - L19 rice compared to the control. Atiehife soil responded better to the reclamation process than the remaining soils, showing high growth performance. Gypsum applied at the rate of 16.92 kg/ha was recommended for adoption.

scholarly journals Influence of Using Various Sugarcane Leaves and Parts of the Sugarcane Leaf on Chemical Composition

1969 ◽  
Vol 51 (1) ◽  
pp. 22-28
Author(s):  
George Samuels
Keyword(s):  
Leaf Blade ◽  
Phosphorus Content ◽  
Critical Factor ◽  
Nutrient Content ◽  
Leaf Sheath ◽  
Leaf Number ◽  
Nitrogen And Phosphorus ◽  
Leaf Sample ◽  
Sugarcane Plant ◽  
Foliar Diagnosis

The leaf sample is a vital and critical factor in a sugarcane foliar-diagnosis program. For, no matter how accurate the chemical analyses, an accurate diagnosis of the sugarcane's fertilizer status is impossible if leaf samples are taken improperly. Variations were found in the nutrient content of the various leaves of the sugarcane plant, as well as variation within the leaf itself. Some of the variations encountered were: 1. The nitrogen and phosphorus contents of the leaf blade were higher than those of the leaf sheath; the reverse was true for potassium. 2. The nitrogen content of the leaf showed only a slight tendency to increase with increasing leaf number. Phosphorus, potassium, and sheath moisture dropped rapidly with increasing leaf number. 3. When the midrib of the leaf blade was eliminated, there was an increase in leaf-blade nitrogen and phosphorus, and a decrease in potassium content. 4. There was considerable variation in the nutrient content of the leaf as we moved from its base to tip. Nitrogen and phosphorus content increased rapidly from base to tip; the reverse was true for potassium.

scholarly journals EFEKTIVITAS PUPUK ORGANIK FESES KUDA HASIL PEMBAKARAN TERHADAP PERTUMBUHAN TANAMAN CABAI MERAH KERITING (Capsicum annum L)

2019 ◽  
Vol 8 (1) ◽  
pp. 15
Author(s):  
Darmawan Risal ◽  
Nurul Mukhlishah
Keyword(s):  
Plant Height ◽  
Organic Fertilizer ◽  
Nutrient Content ◽  
Capsicum Annum ◽  
Horse Manure ◽  
Significant Difference ◽  
Number Of Leaves ◽  
Effect Of Treatment ◽  
The Right ◽  
Different Doses

Organic material derived from horse manure is very abundant and has the potential to be used as organic fertilizer with good nutrient content for plants. This study to utilize organic manure from combustion for growth and productivity of the red chili. In addition, this research was conducted to obtain the right composition of fertilizer doses to increase the growth and production of curly red chili. The method to use the Alfisol soil growing media at the site using polybag by treating different doses on each treatment. The number of treatments were given doses of 0 g (P0), 1 g (P1), 284 g (P2), 426 g (P3) and 568 g (P4) with replications each three times. Analysis metode for use macro nutrient content (N, P, K) and data collection in the form of plant height, leaves, production and environmental factors. Data analysis used Duncan α 0.05. The results of the analysis of the treatment effect on plant height were P4 (Media of soil with combustion horse fertilizer from 568 g) treatment significantly different from other treatments. While other treatments did not show a significant difference in plant height. The effect of treatment on the number of leaves showed no real effect. In the growth and production of curly red chilies there are markedly significant differences. P4 is significantly different from P3, P2, P1 and P0. Whereas P3 is not significantly different from P1 as well as P2 which is significantly different from other treatments. P4 is a treatment with a large number of fruits with an average of 10.3 pieces. While treatment with a small number of fruits is P0 with an average of 2.3 fruits. Combustion horse manure organic fertilizer is quite effective in increasing the growth and production of red chili. It can be assessed from the development of plant height and number of fruits on curly red chili plants. The dose of horse manure organic fertilizer which is good enough for curly red chili plants is 568 g.

scholarly journals The Influence of the Age of Sugarcane on its Leaf-Nutrient (N-P-K) Content

1969 ◽  
Vol 43 (3) ◽  
pp. 159-170
Author(s):  
George Samuels
Keyword(s):  
Nitrogen Content ◽  
Marked Decrease ◽  
Nutrient Content ◽  
Leaf Nitrogen ◽  
Correction Factors ◽  
Growing Period ◽  
Significant Difference ◽  
Foliar Diagnosis ◽  
Time Of Year

The age of sugarcane exerts a definite influence on the nutrient content of the sugarcane leaf. The effects of age on the leaf-nutrient (N-P-K) content were as follows: 1. There was a decrease in the nitrogen content of the leaf as the cane age increased. 2. The rate of decrease of nitrogen with age was greater for nonirrigated than for irrigated cane, being about 2 1/2 times as large for the former as for the latter during the first 7 months. 3. Leaf nitrogen declined more rapidly in ratoons than in plant crops. 4. There was no significant difference in rate of nitrogen decline for the varieties tested: B. 41227, M. 336, and P. R. 980. 5. The time of year the leaf samples were taken had no significant effect on the rate of leaf-nitrogen decline with the age of cane. 6. There was a marked decrease in leaf phosphorus with age of cane in nonirrigated cane up to 4 months, and no change from 4 to 6 months. 7. Irrigated cane decreased in leaf phosphorus, but not quite so rapidly as nonirrigated cane, a decrease apparent until about 9 months. After this the leaf phosphorus began to increase until a cane age of about 14 months, where it once again began decreasing. 8. Leaf potassium did not decrease with age throughout the whole growing period of the sugarcane. At first there was a decrease in leaf potassium with increasing age; however, there was a definite increase as the cane neared maturity. This increase began at about 5 1/2 months for nonirrigated and 15 months for irrigated cane. 9. A table of suggested correction factors for age of sampling is presented to assist workers engaged in foliar diagnosis of sugarcane.

scholarly journals CRESCIMENTO DE PINHÃO-MANSO EM FUNÇÃO DA ÁREA ÚTIL E DO CONSÓRCIO COM TIFTON 85

FLORESTA ◽  
2013 ◽  
Vol 44 (2) ◽  
pp. 207 ◽  
Author(s):  
Deisinara Giane Schulz ◽  
Rubens Fey ◽  
Ubirajara Contro Malavasi ◽  
Marlene De Matos Malavasi
Keyword(s):  
Plant Height ◽  
Jatropha Curcas ◽  
Fruit Production ◽  
Leaf Nitrogen ◽  
Physic Nut ◽  
Nitrogen And Phosphorus ◽  
Jatropha Curcas L ◽  
Growth Area ◽  
Number Of Leaves ◽  
Leaf Nitrogen And Phosphorus

ResumoEste ensaio comparou o crescimento e a produção de frutos de Jatropha curcas L. em função do espaço de crescimento e da presença de Tifton 85. O ensaio foi constituído por arranjos circulares com quatro tratamentos de área útil por planta (1,57 m2, 3,92 m2, 6,28 m2 e 8,63 m2), com oito repetições, consorciado ou não com a herbácea Tifton 85. O cultivo solteiro de pinhão-manso com área útil de 6,28 m2 resultou em menor altura de plantas e maiores teores foliares de nitrogênio e fósforo, enquanto que a área útil de 1,57 m2 resultou em maior altura de plantas. Os menores valores para altura, número de folhas, número de frutos, índice SPAD e teores de nitrogênio e fósforo resultaram do plantio consorciado. Entretanto, a área útil de 1,57 m2 promoveu maiores diâmetros do caule. O diâmetro da copa apresentou os maiores valores em plantas crescendo com área útil de 3,92 m2, enquanto que com 1,57 m2 houve limitação na ampliação da copa. A produção máxima de frutos em cultivo solteiro foi alcançada aos 18 meses após o plantio, correspondente à estação quente do ano, independentemente dos espaçamentos de plantio.Palavras-chave: Cultivo consorciado; espaçamento de plantio; planta forrageira; Jatropha curcas L. AbstractGrowth and fruit production of physic nut as a function of plant growth area and Tifton 85. This essay compared development and fruit production of Jatropha curcas L. in relation to growing space and presence of an herbaceous competitor. The essay was composed by two circular plots with four plant growing areas (1.57 m2, 3.92 m2, 6.28 m2, and 8.63 m2) with eight replications for plot intercropped or not with Tifton 85. The cultivation of physic nut in the spacing of 6.28 m2 resulted in lower plant height and higher levels of leaf nitrogen and phosphorus, while the 1,57 m2 spacing resulted in increased plant height. The lowest values for plant height, number of leaves, number of fruits, SPAD index, and levels of nitrogen and phosphorus resulted in the intercropped plot. However, the 1.57 m2 spacing yelded higher stem diameter. Crown diameter presented the highest values in the 3.92 m2 spacing while the 1.57m2 limited the crown expansion. Maximum fruit production in monocrop plot was reached 18 months after planting date, which corresponded to the warmest season independently of planting space.Keywords: Intercropping; planting spacing; forage; Jatropha curcas L.

Reliable analysis of volatile compounds from small samples of Eucalyptus magnificata (Myrtaceae)

2018 ◽  
Vol 31 (3) ◽  
pp. 232 ◽  
Author(s):  
Timothy L. Collins ◽  
Rose L. Andrew ◽  
Ben W. Greatrex ◽  
Jeremy J. Bruhl
Keyword(s):  
Solvent Extraction ◽  
Small Samples ◽  
Gas Chromatography Mass Spectrometry ◽  
Phytochemical Analysis ◽  
Herbarium Specimens ◽  
Plant Systematics ◽  
Leaf Sample ◽  
Solvent Extract ◽  
Significant Difference ◽  
Number Of Leaves

Phytochemistry is a source of data for plant systematics. This tool has much more value if herbarium specimens can be used without major damage and if results are comparable with fresh samples. A modified method for the solvent extraction of eucalypt leaf oils for phytochemical analysis and chemotaxonomy studies, including historical herbarium samples by gas chromatography–mass spectrometry (GC-MS), has been statistically assessed using Eucalyptus magnificata L.A.S.Johnson & K.D.Hill leaves. Leaf sample size was reduced by a factor of 250 to minimise damage to herbarium specimens, reduce solvent volume and simplify preparation of solvent extract before analysis. Leaf sampling treatments assessed the effects of the number of leaves and post-harvest air-drying on variation in components in the solvent extract. The results showed no statistically significant effect of leaf mass or the number of leaves used in GC-MS analyses on the precision of the measurements, but a significant difference among treatments for some oil constituents, particularly 1,8-cineole. Most differences in terpenoid concentration were due to variation among plants rather than extraction treatments. Extracts from air-dried herbarium leaves up to 44 years old were directly comparable with those from fresh leaves. Solvent extraction in 2 mL GC-MS vials of ~0.5 cm2 (16 mg) of leaf material, using fragments of fresh or air-dried leaves, drastically reduced sample and solvent volumes and showed that sampling from E. magnificata herbarium specimens for chemotaxonomy and chemotyping is a valid method, enabling broader sampling with much lower costs than for traditional fieldwork collections.

Cyclamen Leaf Unfolding Rate in Response to Temperature

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 447d-447
Author(s):  
Meriam Karlsson ◽  
Jeffrey Werner
Keyword(s):  
Day Length ◽  
Leaf Number ◽  
Cyclamen Persicum ◽  
Flower Buds ◽  
Flower Bud ◽  
Leaf Unfolding ◽  
Significant Difference ◽  
Number Of Leaves ◽  
Growth Chambers ◽  
Response To Temperature

Nine-week-old plants of Cyclamen persicum `Miracle Salmon' were transplanted into 10-cm pots and placed in growth chambers at 8, 12, 16, 20, or 24 °C. The irradiance was 10 mol/day per m2 during a 16-h day length. After 8 weeks, the temperature was changed to 16 °C for all plants. Expanded leaves (1 cm or larger) were counted at weekly intervals for each plant. The rate of leaf unfolding increased with temperature to 20 °C. The fastest rate at 20 °C was 0.34 ± 0.05 leaf/day. Flower buds were visible 55 ± 7 days from start of temperature treatments (118 days from seeding) for the plants grown at 12, 16, or 20 °C. Flower buds appeared 60 ± 6.9 days from initiation of treatments for plants grown at 24 °C and 93 ± 8.9 days for cyclamens grown at 8 °C. Although there was no significant difference in rate of flower bud appearance for cyclamens grown at 12, 16, or 20 °C, the number of leaves, flowers, and flower buds varied significantly among all temperature treatments. Leaf number at flowering increased from 38 ± 4.7 for plants at 12 °C to 77 ± 8.3 at 24 °C. Flowers and flower buds increased from 18 ± 2.9 to 52 ± 11.0 as temperature increased from 12 to 24 °C. Plants grown at 8 °C had on average 6 ± 2 visible flower buds, but no open flowers at termination of the study (128 days from start of treatments).

scholarly journals Leaf Nutrient Relations of Cycads in a Common Garden

2021 ◽  
Vol 14 ◽  
pp. 194008292110365
Author(s):  
Thomas E. Marler ◽  
Anders J. Lindström
Keyword(s):  
Common Garden ◽  
Nutrient Content ◽  
Leaf Traits ◽  
Botanical Garden ◽  
Active Management ◽  
Nitrogen And Phosphorus ◽  
Representative Species ◽  
Nutrient Relations ◽  
Homogeneous Environment ◽  
Dry Combustion

Background and Aims Research required to clarify leaf nutrient relations of cycad species has been inadequate. Common garden studies are useful for determining the influence of genetics on leaf traits because of the homogeneous environment among experimental units. To date, there have been no common garden studies which included all ten genera of cycads. The full phylogenetic breadth has, therefore, not been included in this important area of study. Methods We examined macronutrient and micronutrient content of leaves from one representative species from each of the ten cycad genera at Nong Nooch Tropical Botanical Garden in Thailand. Nitrogen content was determined by dry combustion, and the remaining nutrients were quantified by spectrometry. Results The least variable elements were nitrogen and phosphorus, and the most variable elements were boron and sodium. Nutrient content based on leaflet area was more variable than based on leaflet mass, reflecting species differences in specific leaf area. There were no universal macronutrient or micronutrient signals indicating clear phylogenetic distinctions. Implications for Conservation: Active management of threatened cycad taxa requires research to develop the knowledge to enable evidence-based decisions. This common garden study inclusive of all 10 cycad genera creates a foundation to determine leaf nutrient sufficiency ranges to inform management decisions.

scholarly journals Nitrogen Supply Affects Grain Yield by Regulating Antioxidant Enzyme Activity and Photosynthetic Capacity of Maize Plant in the Loess Plateau

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1094
Author(s):  
Kai Yue ◽  
Lingling Li ◽  
Junhong Xie ◽  
Setor Kwami Fudjoe ◽  
Renzhi Zhang ◽  
...  
Keyword(s):  
Grain Yield ◽  
Antioxidant Enzyme ◽  
Loess Plateau ◽  
Photosynthetic Capacity ◽  
Growth And Yield ◽  
Dry Matter Accumulation ◽  
The Loess Plateau ◽  
Area Index ◽  
Leaf Stage ◽  
Significant Difference

Nitrogen (N) is the most limiting nutrient for maize, and appropriate N fertilization can promote maize growth and yield. The effect of N fertilizer rates and timings on morphology, antioxidant enzymes, and grain yield of maize (Zea mays L.) in the Loess Plateau of China was evaluated. The four N levels, i.e., 0 (N0), 100 (N1), 200 (N2), and 300 (N3) kg ha−1, were applied at two timings (T1, one-third N at sowing and two-thirds at the six-leaf stage of maize; T2, one-third applied at sowing, six-leaf stage, and eleven-leaf stage of maize). The results show that N2 and N3 significantly increased the plant height, stem and leaf dry weight, and leaf area index of maize compared with a non-N-fertilized control (N0). The net photosynthetic rate, transpiration rate, stomatal conductance, and leaf chlorophyll contents were lower, while the intercellular carbon dioxide concentration was higher for non-fertilized plants compared to fertilized plants. The activities of peroxidase (POD) and superoxide dismutase (SOD) increased with N rate, but the difference between 200 and 300 kg ha−1 was not significant; further, the isozyme bands of POD and SOD also changed with their activities. Compared with a non-N-fertilized control, N2 and N3 significantly increased grain yield by 2.76- and 3.11-fold in 2018, 2.74- and 2.80-fold in 2019, and 2.71- and 2.89-fold in 2020, and there was no significant difference between N2 and N3. N application timing only affected yield in 2018. In conclusion, 200 kg N ha−1 application increased yield through optimizing the antioxidant enzyme system, increasing photosynthetic capacity, and promoting dry matter accumulation. Further research is necessary to evaluate the response of more cultivars under more seasons to validate the results obtained.

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