scholarly journals EFFETS DE LA DENSITE DU PEUPLEMENT ET DE L’APPORT DES ELEMENTS N, P ET K SUR LA PRODUCTION D’ENSILAGE DE MAIS DE MATURITE DIFFERENTE

1977 ◽  
Vol 57 (3) ◽  
pp. 735-743
Author(s):  
JEAN GENEST ◽  
JEAN-LOUIS DIONNE
Keyword(s):  
Dry Matter ◽  
Plant Density ◽  
Corn Silage ◽  
Matter Production ◽  
Plant Densities ◽  
Silage Production ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
K Fertilization ◽  
Corn Hybrid

The experiment was designed to measure the effect of corn maturity, plant density, nitrogen, phosphorus and potassium fertilization on corn silage production. Funk’s G 4252 corn hybrid planted 10 cm apart in rows 75 cm apart produced an average of 18,325 kg/ha of dry matter over 4 yr, when fertilized with 200 kg/ha of N. Nitrogen fertilization, plant density, and choice of hybrid were the most important factors in dry matter production. Yield increases of 30% were associated with a 3% decrease in quality. Optimum yields were predicted for plant densities of 133,000 pl/ha with 180 kg/ha of N. There was no significant response to P and K fertilization. Yearly applications of P at 50 kg/ha allowed an increase in available P in the soil. Even with yearly applications of K at 200 kg/ha, a constant decrease in soil exchangeable K content was observed.

Relationships between production, nutrient accumulation, and chlorophyll synthesis in an Eleocharis quadrangulata population

1971 ◽  
Vol 49 (6) ◽  
pp. 883-888 ◽  
Author(s):  
Claude E. Boyd ◽  
David H. Vickers
Keyword(s):  
Standing Crop ◽  
Dry Matter ◽  
Aquatic Macrophytes ◽  
Chlorophyll Synthesis ◽  
Early Spring ◽  
Chemical Substances ◽  
Net Productivity ◽  
Matter Production ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Maximum standing crop in an Eleocharis quadrangulata population was estimated at 881 g dry wt./m2. Net daily productivity was highest during May when about 50% of the total standing crop was produced. Net productivity for the entire period of vegetative increase, April 1 to August 4, was 7.0 g/m2 per day. The accumulation of several nutrients, especially nitrogen, phosphorus, and potassium was proportionately more rapid than dry matter production during early spring growth. Net chlorophyll synthesis was also greater during early spring. Patterns of change in dry matter and chemical substances in the E. quadrangulata population were similar to those in populations of other emergent aquatic macrophytes.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce III. Nitrogen Content and Response to Nitrogen

1957 ◽  
Vol 10 (3) ◽  
pp. 253 ◽  
Author(s):  
WG Slater ◽  
DW Goodall
Keyword(s):  
Dry Matter ◽  
Nitrate Nitrogen ◽  
Analytical Data ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Matter Production ◽  
Subsequent Response ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and receiving nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for total, soluble, and nitrate nitrogen. An attempt was made to relate these analytical data to the subsequent response (in dry matter production) shown by the plants when a further amount of nitrogen was supplied.

scholarly journals White lupine yield under different sowing densities and row spacings

2016 ◽  
Vol 20 (10) ◽  
pp. 903-907 ◽  
Author(s):  
Antônio L. Santi ◽  
Geomar M. Corassa ◽  
Ronei Gaviraghi ◽  
Thomas N. Martin ◽  
Mateus B. Bisognin ◽  
...  
Keyword(s):  
Experimental Design ◽  
Grain Yield ◽  
Plant Tissue ◽  
Dry Matter ◽  
Plant Density ◽  
Row Spacing ◽  
Dry Matter Yield ◽  
White Lupine ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

ABSTRACT The study aimed to evaluate different sowing densities and row spacings on grain yield and biomass in the white lupine crop, cv. ‘Comum’. The experimental design was a randomized block in a 4 x 4 factorial scheme, with four row spacings (20, 40, 60 and 80 cm) and four sowing densities in the row (10, 15, 20 and 25 plants m-1), with four replicates. The evaluated variables were: grain yield, hundred-grain weight, fresh and dry matter and the contents of nitrogen, phosphorus and potassium in the plant tissue. The highest grain yield was obtained with row spacing of 20 cm, regardless of plant density. The density of 25 plants m-1 and row spacing of 20 cm increased the fresh and dry matter yield. The adjustment of plant density and row spacing did not affect the content of nitrogen, phosphorus and potassium in plant tissue.

Nutrient Interactions and Deficiency Diagnosis in the Lettuce V. Potassium Content and Response to Potassium

1958 ◽  
Vol 11 (4) ◽  
pp. 471 ◽  
Author(s):  
AE Grant Lipp ◽  
DW Goodall
Keyword(s):  
Dry Matter ◽  
Analytical Data ◽  
Potassium Content ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Matter Production ◽  
Subsequent Response ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and receiving nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for these elements. An attempt was made to relate these analytical data to the subsequent response (in dry matter production) shown by the plants when a further amount of potassium was supplied.

The relationships between tuber size and tuber concentrations of nitrogen, phosphorus and potassium

1976 ◽  
Vol 86 (3) ◽  
pp. 503-505 ◽  
Author(s):  
E. J. Allen ◽  
D. C. E. Wurr
Keyword(s):  
Dry Matter ◽  
Dry Weight ◽  
Sampling Procedure ◽  
Tuber Size ◽  
Weight Basis ◽  
Tuber Size Distribution ◽  
Plant Densities ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

SummaryIn each of two experiments two potato varieties were grown at a range of plant densities in order to provide mature tubers of different sizes for the study of the relationshipsbetween tuber size and tuber concentration of nitrogen (N), phosphorus (P) and potassium (K). As tuber size increased, the concentrations of tuber nutrients (g/100 g dry matter) declined to a minimum value and then tended to increase with a further increase in tuber size. This suggests that when tuber samples are taken for the determination of tuber nutrient concentration on a dry-weight basis the sampling procedure should ensure that results do not vary because of differences in the tuber size distribution.

An analysis of the growth of mung beans at a range of plant densities in tropical Australia. I. Dry matter production

1982 ◽  
Vol 33 (1) ◽  
pp. 41 ◽  
Author(s):  
RC Muchow ◽  
DA Charles-Edwards
Keyword(s):  
Dry Matter ◽  
Plant Density ◽  
Incident Light ◽  
Dry Matter Production ◽  
Wet Season ◽  
Matter Production ◽  
Light Utilization ◽  
Plant Densities ◽  
Tropical Australia ◽  
Photosynthetic Activities

An experiment was conducted during the wet season in monsoonal tropical Australia to determine (a) whether plant density affected above-ground dry matter production of Vigna vadiata cv. Berken and, if so, what those effects could be attributed to, and (b) if there were differences between V. vadiata cvv. Berken and CES-ID-21 and V, mungo cv. Regur in their efficiencies of utilization of incident light energy for the production of dry matter. Differences in above-ground dry matter production of the Berken crops growing at three different plant densities could be attributed primarily to the different times taken by them to reach full light interception. In contrast, differences in above-ground dry matter production between species and cultivars were due to differences in both their efficiencies of light utilization and the amounts of light intercepted by them. Further measurements are required to determine whether the observed differences in light utilization efficiencies are attributable to differences in potential photosynthetic activities or to differences in partitioning of dry matter between root and shoot.

scholarly journals Mulch decomposition and nitrogen, phosphorus and potassium release in vetiver grass at different plant densities

2020 ◽  
Vol 50 ◽  
Author(s):  
Jaídson Gonçalves da Rocha ◽  
Fábio Cunha Coelho ◽  
Rosana Teixeira Lelis ◽  
Gabriela Carvalho de Souza Santos ◽  
Mario Euclides Pechara da Costa Jaeggi
Keyword(s):  
Plant Density ◽  
Block Design ◽  
Dry Weight ◽  
Vetiver Grass ◽  
Release Rates ◽  
Randomized Block Design ◽  
Plant Densities ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
The Ideal

ABSTRACT In order to meet the need for nutrients or soil cover, when plants are used as green manure, it is necessary to determine the ideal plant population, as well as the amount and duration of released nutrients. This study aimed to assess the decomposition and nitrogen (N), phosphorus (P) and potassium (K) release rates of vetiver grass mulch. A split-plot arrangement was used, with the plots consisting of mulch decomposition times after cutting (0, 15, 25, 70 and 125 days) and the subplots of vetiver plant densities (1, 2, 3 and 4 plants m-2). A randomized block design was used, with four replications. The highest release rates for N, P and K were recorded during the first five days. The plant density of 3 plants m-2 exhibited the highest mulch dry weight at 125 days and contained more N, P and K, when compared to the populations of 1, 2 and 4 plants m-2.

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