A multivariate approach to plant mineral nutrition: dose–response relationships and nutrient dominance in factorial experiments

1985 ◽  
Vol 63 (12) ◽  
pp. 2138-2143 ◽  
Author(s):  
G. R. Shaver ◽  
M. J. Lechowicz
Keyword(s):  
Dose Response ◽  
Nutrient Content ◽  
N Fertilization ◽  
Mineral Elements ◽  
P Fertilization ◽  
Canonical Variates Analysis ◽  
Canonical Variates ◽  
Low Levels ◽  
High Fertilization ◽  
K Fertilization

Canonical variates analysis was used to compare the effects of fertilization on the concentrations of five mineral elements (N, P, K, Ca, and Mg) in young shoot tissues of six tundra plant species of three different growth forms. There were two specific objectives: (i) to determine whether it was possible to describe meaningful dose–response relationships in a multivariate response to fertilization, and (ii) to determine the multivariate effect of N plus P fertilization in comparison with the effects of N or P added alone. The results showed that low levels of N–P–K fertilization caused a shift in multivariate nutrient content that was intermediate between the control values and the shift caused by high fertilization, and in the same direction as the latter. In a June harvest, the effect of N plus P fertilization was very similar to the effect of N fertilization alone. However, in August the N plus P effect was dominated by the response to P alone. In all of the analyses, the fundamental similarities and differences among unfertilized plants of each species and growth form were maintained under fertilization.

THE EFFECT OF NPK FERTILIZATION ON ELEMENT UPTAKE, YIELD AND FRUIT COMPOSITION OF FOCH GRAPES IN BRITISH COLUMBIA

1987 ◽  
Vol 67 (2) ◽  
pp. 511-520 ◽  
Author(s):  
G. H. NEILSEN ◽  
D. S. STEVENSON ◽  
A. GEHRINGER
Keyword(s):  
Sandy Loam ◽  
Titratable Acidity ◽  
N Fertilization ◽  
Soluble Solids ◽  
Yield Response ◽  
P Fertilization ◽  
Fruit Composition ◽  
Loam Soil ◽  
K Fertilization ◽  
Npk Fertilization

Irrigated French-American hybrid Foch grapevines planted in 1979 on a sandy loam soil were fertilized in narrow in-row strips with rates of N of 50, 150 and 300 kg ha−1 yr−1, rates of P of 0 or 90 kg ha−1 yr−1, and rates of K of 0 or 500 kg ha−1 yr−1; each rate combined with the others to form 12 NPK treatments from 1980 through 1985. Petiole N, P and K concentrations were increased by their respective fertilizer additions. Nitrogen fertilization also consistently increased cluster weight and yield in two of the four harvests although petiole Ca, Mg and Zn were decreased at the 150- and 300-kg rates of N fertilization. Yield per vine was increased in the first fruiting year by P fertilization, although subsequent yield and petiole Ca, Mg and Zn were unaffected. No yield response to K fertilization was observed but petiole Mg was decreased in all 5 yr and petiole Ca in 3 yr as a consequence of K fertilization. In general, soluble solids and titratable acidity in the fruit were not consistently affected by NPK fertilization although juice pH was increased in 2 of 3 yr at the highest rates of N and K fertilization and in 1 yr at the highest rate of P fertilization.Key words: NPK, Foch grapes, yield, fruit composition

scholarly journals Effects of Nitrogen and Potassium Fertilization on Nutrient Content and Quality Attributes of Sweet Cherry Fruits

2018 ◽  
Vol 47 (1) ◽  
pp. 114-118 ◽  
Author(s):  
Kadir UCGUN
Keyword(s):  
Fruit Quality ◽  
Sweet Cherry ◽  
Nutrient Content ◽  
Quality Attributes ◽  
N Fertilization ◽  
Tree Canopy ◽  
N Content ◽  
Nutrient Contents ◽  
Fruit Samples ◽  
K Fertilization

Fertilizers are commonly applied to improve the yield and quality in orchards. But unbalanced fertilization negatively affects the nutrient contents of the fruits. Fruits with low energy and high mineral and vitamin contents are significant foods for human nutrition and human health. This study was carried out with ‘0900 Ziraat’ sweet cherry cultivar grafted on ‘Gisela 5’ rootstock in two consecutive years. The effects of different nitrogen (N) and Potassium (K) doses on nutrient content of fruits were investigated. Different doses of N (0, 50, 125 and 250 g N tree-1) and K (0, 50, 125 and 250 g K2O tree-1) were applied beneath the tree canopy in 6 replications and 1 tree in every replication in two consecutive years. Fruit samples were harvested from each tree and fruit colour, firmness, cracking index and nutrient contents (N, P, K, Ca, Mg, Fe, Zn and B) were determined. Fruit N content, N:K ratio, L*, a*, C* and firmness values increased with increasing N doses. While K fertilization did not have significant effects on K content and N:K ratio, it negatively influenced the N content of the fruits. It was concluded that N fertilization directly influenced fruit quality attributes, but K fertilization did not have any significant effects on fruit quality parameters.

scholarly journals Nutrient cycling in a RRIM 600 clone rubber plantation

2003 ◽  
Vol 60 (2) ◽  
pp. 353-357 ◽  
Author(s):  
Marcos Roberto Murbach ◽  
Antonio Enedi Boaretto ◽  
Takashi Muraoka ◽  
Euclides Caxambu Alexandrino de Souza
Keyword(s):  
Nutrient Cycling ◽  
Rubber Tree ◽  
Nutrient Content ◽  
Nutrient Loss ◽  
Tree Plantations ◽  
Rubber Plantation ◽  
Rubber Latex ◽  
Nutrient Retranslocation ◽  
One Year ◽  
K Fertilization

Few reports have been presented on nutrient cycling in rubber tree plantations (Hevea brasiliensis Muell. Arg.). This experiment was carried out to evaluate: the effect of K rates on the amount of nutrients transfered to the soil in a 13-year old Hevea brasilensis RRIM 600 clone plantation, nutrient retranslocation from the leaves before falling to the soil, and nutrient loss by dry rubber export. The experiment started in 1998 and potassium was applied at the rates of 0, 40, 80 and 160 kg ha-1 of K2O under the crowns of 40 rubber trees of each plot. Literfall collectors, five per plot, were randomly distributed within the plots under the trees. The accumulated literfall was collected monthly during one year. The coagulated rubber latex from each plot was weighed, and samples were analyzed for nutrient content. Increasing K fertilization rates also increased the K content in leaf literfall. Calcium and N were the most recycled leaf nutrients to the soil via litterfall. Potassium, followed by P were the nutrients with the highest retranslocation rates. Potassium was the most exported nutrient by the harvested rubber, and this amount was higher than that transfered to the soil by the leaf literfall.

scholarly journals Long-term annual fertilization with nitrogen and potassium affect yield and mineral composition of 'Fuji' apple

2009 ◽  
Vol 66 (3) ◽  
pp. 377-385 ◽  
Author(s):  
Gilberto Nava ◽  
Antonio Roque Dechen
Keyword(s):  
Mineral Composition ◽  
Fruit Size ◽  
N Fertilization ◽  
K Fertilizer ◽  
Fuji Apple ◽  
The Mean ◽  
K Concentration ◽  
Fertilizer Rates ◽  
K Fertilization

Nitrogen (N) and potassium (K) are closely related to orchard productivity, since they are usually found in higher concentrations than others macronutrients in apple (Malus × domestica Borkh) fruits. This research was carried out to assess the effect of eight years of soil additions of N and K on yield, fruit size and mineral composition of 'Fuji'/Marubakaido apple in São Joaquim, State of Santa Catarina, Southern Brazil. A factorial design was used with N and K annual fertilizer rates (0, 50, 100, 200 kg ha-1 of N and K2O) replicated in three orchards from 1998 to 2006. Yield was estimated by multiplying the total number of fruit per tree by the mean weight of 100 randomly sampled fruit. Fifteen days prior to harvest, 24 fruit pulps were analyzed for N, K, Ca and Mg contents. Increases in yields were noticed in five and four years, due to the N and K fertilizer additions, respectively. Fruit size was more affected by K than by N fertilization. Fruit mineral composition was affected by both N and K fertilization. N concentration and N:Ca ratios were enlarged by N fertilization. K concentration and K:Ca ratios were also enlarged by K fertilization. Ca fruit concentration was reduced by N fertilization and often by K. Ca-related fruit disorders were not observed even after 180 days storage. However, N and K fertilization affected Ca nutrition. Thus, when fertilizing with N and K, it is imperative to use combined practices in order to offset the detrimental effect that these nutrients may cause on Ca concentration in the fruit.

scholarly journals THE INFLUENCE OF FERTILIZATION AND RAINFALL ON WHEAT PRODUCTION

1970 ◽  
Vol 62 ◽  
Author(s):  
C. Naidin
Keyword(s):  
Plant Development ◽  
Vegetation Period ◽  
N Fertilization ◽  
Wheat Crop ◽  
Growth Stages ◽  
P Fertilization ◽  
Wheat Production ◽  
Previous Crop ◽  
Rainfall Deficit ◽  
Higher Doses

In this paper, we analyze the influence of N and P fertilization on wheat yields, taking into account the previous crop and the level of rainfall accumulated until the end of the growth stages in plant development. In the wheat crops developed on the reddish-brown low luvi soil found at ARDS Simnic, the N fertilization has favorable effects in moderate doses (60 - 100 kg N/ha after corn and 60 - 90 kg N/ha after peas), while in higher doses (120 - 160 kg N/ha) fertilization determines a fall in production, both in the case of rainfall deficit and excess. The P has favorable effects on wheat crops, especially when the previous crop is peas. The rainfall quantity, as well as its repartition along the vegetation period, influences the wheat crop, causing great variations from year to year. The obtained data shows that rainfall deficit as well as rainfall excess determines a drop in wheat production; relatively high and stable average productions can be obtained in the case of rainfall levels close to the multi annual averages in different plant development stages.

scholarly journals IDENTIFIKASI KOMPONEN ISOFLAVONOID PADA BUAH BALANGKASUA (Lepisanthes alata (Blume) Leenh.)

2019 ◽  
Vol 44 (2) ◽  
pp. 205
Author(s):  
Susi Susi
Keyword(s):  
Vitamin C ◽  
Rural Areas ◽  
Research Result ◽  
Nutrient Content ◽  
Crude Fiber ◽  
Total Acid ◽  
Growth Area ◽  
Phytochemical Compounds ◽  
Low Levels ◽  
Peel Extract

Balangkasua (Lepisanthes alata (Blume) Leenh.) is one of the exotic fruit typical of South Kalimantan, there are two kinds are yellow and purple-peel. This exotic fruit is still relatively low levels of consumption, this is because the harvest period is very short, not yet commercially grown, the growth area is in rural areas that are generally difficult to reach by public. Though the content of the nutritional value and phytochemical compounds that can be utilized. This research was aimed to determine the nutrient content in the pulp and peel and identify isoflavonoid component in the methanol extract of peel, pulp and seeds of purple peel balangkasua. Research result showed that pulp balangkasua contain protein of 8.40%, crude fiber of 21.76%, total acid of 26.90 mg KOH / g as well as vitamin C of 41.50 mg / 100 g, whereas in peel has a protein content of 4.20%, crude fiber of 37.83%, total acid of 13.47% and vitamin C of 38 mg/100 g).  Balangkasua was detected contain isoflavonoid compound there were equol and daidzein in seed, pulp was contained genestein, equol and genistin, and in the peel extract was contained genestein.

Letter To The Editor

PEDIATRICS ◽  
1978 ◽  
Vol 62 (5) ◽  
pp. 862-863
Author(s):  
P. R. J. Burch
Keyword(s):  
Dose Response ◽  
Maternal Smoking ◽  
Linear Dose ◽  
Letter To The Editor ◽  
Low Levels ◽  
Newborn Size

Dr. Garn and his colleagues have found a crudely linear "dose-response" relation between maternal smoking and various measures of newborn size and prematurity. I regret I cannot agree with them that their findings stretch a constitutional explanation to the uttermost. We can distinguish at least two types of smoker: the so-called social or nonconstitutional smoker and the habituated or constitutional smoker. At low levels of smoking the former type will predominate, but at high levels the latter will.

scholarly journals Yield and Nutritional Quality of Cabbage as Affected by Nitrogen and Phosphorus Fertilization

1970 ◽  
Vol 41 (1) ◽  
pp. 41-46
Author(s):  
KMF Haque ◽  
AA Jahangir ◽  
ME Haque ◽  
RK Mondal ◽  
MAA Jahan ◽  
...  
Keyword(s):  
Block Design ◽  
Growth Yield ◽  
Nutrient Content ◽  
Phosphorus Fertilization ◽  
Fertilizer Treatment ◽  
P Fertilization ◽  
Nitrogen And Phosphorus ◽  
Titrable Acidity ◽  
Nitrogen Phosphorus

An experiment was conducted in field condition to study the effect of nitrogen-phosphorus fertilization on growth, yield and nutrient content of cabbage. The experiment was laid out in randomize block design with three replications. The yield and yield components were maximized by N3P2 fertilizer treatment. Nutrient content of cabbage varied with fertilizer treatment. The maximum amount of reducing sugar, ascorbic acid, phosphorus were found at the highest rate of N - P fertilization whereas accumulation of titrable acidity, iron, calcium were maximum at the rate of N2P2 treatment. However pH, ash content were more or less same throughout the experiment. Bangladesh J. Sci. Ind. Res. 41(1-2), 41-46, 2006

Sign in / Sign up

Export Citation Format

Share Document