Influence of nitrogen and phosphorus supply on foliage growth and internal recycling of nitrogen in conifer seedlings (Prumnopitys ferruginea)

2003 ◽  
Vol 30 (1) ◽  
pp. 49 ◽  
Author(s):  
Fiona E. Carswell ◽  
Peter Millard ◽  
Graeme N. D. Rogers ◽  
David Whitehead
Keyword(s):  
Growth Habit ◽  
Nutrient Supply ◽  
First Year ◽  
Nitrogen Storage ◽  
Nitrogen And Phosphorus ◽  
Indeterminate Growth ◽  
Indeterminate Growth Habit ◽  
Second Year ◽  
Nutrient Solutions ◽  
Internal Cycling

The dynamics of internal cycling of nitrogen were studied in the southern hemisphere conifer miro [Prumnopitys ferruginea (G. Benn. ex D. Don) de Laub.], which has an indeterminate growth habit. In a 2-year experiment, P. ferruginea seedlings were supplied with nutrient solutions consisting of two different concentrations of nitrogen (5 and 0.5 mM) and phosphorus (1.33 and 0.133 mM) in the first year, and two concentrations (5 and 0.5�mM) of a 15N-labelled nitrogen solution in the second year. Growth and nitrogen content of new foliage were shown to be largely dependent on seedling nitrogen status at the end of the first year, and only weakly dependent on nutrient supply in the second. An average of 70% of total nitrogen in new foliage was remobilised from storage in the first 63 d after flushing began. The remainder of new-foliage nitrogen was derived by root uptake from the nutrient supply in the second year. There was some response of nitrogen uptake to high nitrogen supply in the second year where seedlings had been nitrogen deficient at the end of the first year. However, it was concluded that the indeterminate growth habit of P. ferruginea did not distinguish its pattern of nitrogen storage and remobilisation from that of determinate conifers.

scholarly journals Tomato production in hydroponic system using different agrofilms as greenhouse cover

2020 ◽  
Vol 38 (1) ◽  
pp. 58-64
Author(s):  
Douglas José Marques ◽  
Edmur Matheus Filho ◽  
Hudson C Bianchini ◽  
Valdir Veroneze Junior ◽  
Breno Régis Santos ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Crop Production ◽  
Growth Habit ◽  
Soluble Solids ◽  
Tomato Crop ◽  
Indeterminate Growth ◽  
Tomato Production ◽  
Hydroponic System ◽  
Indeterminate Growth Habit ◽  
Lycopene Content

ABSTRACT Protected cultivation has increased over the years. More studies on the benefits of using photoselective agrofilms are necessary. The choice of material to cover the greenhouse is a decisive factor for crop development and production. The aim of this study was to evaluate the effect of diffuser and blue-colored agrofilms on the production of different tomato cultivars of indeterminate growth habit under NFT hydroponic system. A completely randomized design in a 2x3 factorial scheme (two environments and three cultivars) was used: two agrofilm types (blue and diffuser) and 3 cultivars (Monterrey, Arendell and Totalle). Each plot consisted of 30 plants per treatment, with four replicates. Commercial tomato seedlings of indeterminate growth habit grafted on rootstock cultivar (Shincheonggang) were used. During the experiment, the electrical conductivity, intensity of radiation inside the greenhouse, gas exchange, soluble solids, lycopene content, pH and fruit production were evaluated. We concluded that the amount of radiation transmitted through the diffuser favors an increase of about 18% in gas exchange, 12% in lycopene content and 9.4% in tomato crop production.

scholarly journals Fertilizing of young rubber in the Cameroons.

1960 ◽  
Vol 8 (3) ◽  
pp. 165-178
Author(s):  
H.N. Hasselo
Keyword(s):  
Phosphate Rock ◽  
Growth Response ◽  
Nutrient Status ◽  
Nutrient Supply ◽  
Parent Material ◽  
Rooting Depth ◽  
First Year ◽  
Second Year ◽  
One Year ◽  
Shallow Soils

The growth response to (NH4)2SO4, phosphate rock and KC1, given in all combinations at increasing annual rates of up to 24 oz/tree until the seventh year after planting, was measured by the girth increase of Hevea in three soils formed from the same parent material but possessing different nutrient status and depths to the root-impeding layers. Despite poor nutrient supply in the soil, lack of rooting depth had a greater effect on growth than had nutrient availability; while abundant nutrient supply reduced the unproductive period by half a year, this reduction was at least one year in shallow soils. Annual fluctuations in yield were reduced by balanced application of small amounts of fertilizers. Fertilized trees, opened up at 18-inch girth, yielded 430 lb/acre in the first year whether given balanced fertilizer or not; in the second year, trees given balanced fertilizer yielded 700 lb as compared with 580 lb without fertilizer. (Abstract retrieved from CAB Abstracts by CABI’s permission)

CROP RESPONSE TO LIME AND FERTILIZER SUPERIMPOSED ON DIFFERENT TILLAGE TREATMENTS FOR A VIRGIN GREY WOODED SOIL

1963 ◽  
Vol 43 (2) ◽  
pp. 298-308
Author(s):  
Herman A. Hamilton ◽  
J. R. Lessard
Keyword(s):  
Surface Soil ◽  
The Other ◽  
First Year ◽  
Crop Response ◽  
Nitrogen And Phosphorus ◽  
Residual Phosphorus ◽  
Second Year ◽  
Tillage Treatment ◽  
Nitrogen Phosphorus ◽  
Forage Yields

A virgin Grey Wooded soil was subjected to different tillage treatments receiving various rates of nitrogen, phosphorus and lime. In a 5-year rotation of oats followed by 4 years of hay, oat forage yields with 24-inch plowing appeared to be less than those obtained with shallower tillage treatments, but the subsequent first- and second-year hay yields were substantially higher. Nitrogen and phosphorus significantly increased oat forage yields irrespective of tillage treatment. Increases in first-year hay yields due to residual phosphorus were highly significant with 12-inch and 24-inch plowing. Second-year hay yields were significantly increased by residual phosphorus on all tillage treatments with increases being in the order 12-inch plowing and disking greater than 6-inch and 24-inch plowing. Irrespective of tillage treatment, lowest hay yields were obtained in the first year of harvest. Despite the greater saturation of the sub-surface soil with bases, lime significantly increased hay yields on plots plowed to 24 inches. Whereas the legume component of the hay mixture was initially high on plots plowed to 24 inches, in the succeeding years the percentage decreased considerably. On the other hand, legume percentage, which was initially low, increased for plots that were disked or plowed to 6 inches. Plowing to a depth of 12 inches appeared to be the most satisfactory procedure in maintaining the best hay yields with a high percentage of legumes.

scholarly journals INDUSTRIAL TOMATO FOR FRESH CONSUMPTION: A TECHNICAL AND ECONOMICALLY VIABLE ALTERNATIVE

2020 ◽  
Vol 7 (3) ◽  
pp. 20-28
Author(s):  
Daianna Pereira Costa ◽  
Juliana Nascimento Da Silva ◽  
Donielsin Da Silva Assunção ◽  
Fritz Mohn Penteado ◽  
Abadia Dos Reis Nascimento
Keyword(s):  
Experimental Design ◽  
Production Cost ◽  
Growth Habit ◽  
Viable Alternative ◽  
Economic Viability ◽  
Indeterminate Growth ◽  
Tomato Production ◽  
Indeterminate Growth Habit ◽  
Lower Production ◽  
Tomato Genotypes

The cultivation of hybrid tomatoes, intended for fresh consumption, with a determined growth habit, and without support, is an alternative that has a lower production cost. The research aimed to evaluate the productivity and economic viability of different tomato genotypes, with a determinate and indeterminate growth habit. The experimental design was in completely randomized blocks. Ten hybrids and a variety were grown in 2016, and nine hybrids, and a variety in 2018, with a spacing of 0.5 meters between plants. Harvests were carried out in four periods in 2016, at 72, 82, 97, and 105 days after transplanting (DAT); and in 2018 at 81, 87, 97, and 111 DAT. After harvesting, the gross value of production and profit were quantified. The hybrids that obtained the highest production per plant in 2016 were Gabrielle (6,010 kg), with support; Thaise (5.529 kg); and N901 (5.003 kg). In 2018, Dominador and Thaise hybrids had the highest production, with 4.109 and 3.961 kg per plant, respectively. The gross value of tomato production in 2016 was higher than in 2018 for all hybrids and variety, except for Dominador hybrid. Hybrids with a determined growth habit and conducted without support are a profitable alternative to produce tomatoes intended for fresh consumption, especially the hybrid Gabrielle, which had the highest production. The economic viability of hybrids grown without support is superior to all hybrids with support.

scholarly journals Root foraging and yield components underlying limited effects of Partial Root-zone Drying on oilseed rape, a crop with an indeterminate growth habit

2009 ◽  
Vol 323 (1-2) ◽  
pp. 163-176 ◽  
Author(s):  
Jinfeng Wang ◽  
Hans de Kroon ◽  
Ling Wang ◽  
Hannie de Caluwe ◽  
Gerard M. Bögemann ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
Yield Components ◽  
Growth Habit ◽  
Root Zone ◽  
Indeterminate Growth ◽  
Root Foraging ◽  
Indeterminate Growth Habit

scholarly journals Identification of RAPD Markers Linked to Major Gene for Indeterminate Growth Habit using Bulked Segregant Analysis in Common Bean Cross

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 623c-623
Author(s):  
S.O. Park ◽  
J.M. Bokosi ◽  
D.P. Coyne
Keyword(s):  
Rapd Markers ◽  
Growth Habit ◽  
Bulked Segregant Analysis ◽  
Major Gene ◽  
Indeterminate Growth ◽  
Bulked Dna ◽  
Rapd Primer ◽  
Plant Growth Habit ◽  
Indeterminate Growth Habit ◽  
Determinate Growth

Plant growth habit is an important trait. Our objective was to identify RAPD markers linked to major gene for indeterminate growth habit using bulked segregant analysis in an F2 population from a bean cross Chichara (indeterminate growth habit × PC-50 (determinate growth habit). A total of 132 RAPD primers (600 RAPD primer screened) showed polymorphisms between bulked DNA derived from indeterminate and determinate plants. All markers showed coupling linkage with indeterminate growth habit. RAPD markers of A-8, A-17, C-7, C-15, D-4, D-5, F-6, F-16, G-9, H-3, H-20, and I-7 were 2.2 cM distant from the gene for indeterminate growth habit. Markers of B-7, B-16, B-17, C-8, E-1, F-1, F-20 and H-l9 primers were 4.6 cM distant from the gene for indeterminate growth habit.

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