Effects of Changes in Boron Nutrition on Growth and Development of Subterranean Clover

Bouma, D

doi:10.1071/bi9690523

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…. Similar effects of B deficiency on the DM of young and old leaves have been observed previously in subterranean clover (Bouma, 1969). Apparently, when the B supply from the roots is exhausted, too little B is mobilized from the old leaves of soybean or subterranean clover to prevent B deficiency from developing -• ... in young leaves and meristems; old leaves remain B adequate and, with the elimination of other sinks, accumulate the products of their own photosynthesis.…”

Section: Response Of Plant Dry Matter To B Deficiency and Its Relatiosupporting

confidence: 72%

Functional Boron Requirement for Leaf Expansion and Its Use as a Critical Value for Diagnosis of Boron Deficiency in Soybean

Kirk

Loneragan

1988

Agronomy Journal

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The slow response of shoot dry matter to nutrient stress under many experimental conditions sometimes makes it an unsatisfactory criterion for defining critical concentrations of nutrients for deficiency diagnosis by plant analysis. This study was done to see if the relationship between the B concentration in young leaves and their rate of elongation could be used to define critical values for diagnosis of B deficiency in soybean [Glycine max (L.) Merr.] Soybean was grown in nonrenewed solution culture at two initial B concentrations chosen so that plants at the lower concentration became deficient during the growing period, while those at the higher B concentration remained healthy. Boron deficiency depressed dry matter (DM) of roots and young leaves but increased DM of older, expanded leaves, thus delaying the response of total shoot DM to B deficiency. As B supply became depleted, B concentrations in young leaves declined rapidly from 20 to 3 mg kg−1 DM, giving falsely low values for diagnosis of B deficiency when correlated with shoot DM. The rate of elongation of young expanding leaflet blades was depressed by B deficiency earlier than shoot DM. Correlation of B concentration in young leaves with their elongation rate suggests that they require 12 mg B kg−1 DM to achieve 90% of their maximal rate. It is suggested that this value represents the functional B requirement for leaf expansion and that it provides a more consistent and accurate critical value for diagnosis of B deficiency in soybean than that determined by correlation with shoot DM in the usual way.

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Section: Response Of Plant Dry Matter To B Deficiency and Its Relatiosupporting

confidence: 72%

Functional Boron Requirement for Leaf Expansion and Its Use as a Critical Value for Diagnosis of Boron Deficiency in Soybean

Kirk

Loneragan

1988

Agronomy Journal

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“…Leaf temperature was not affected significantly by different treatments. Marschner et al,' 1986;Bouma, 1969;Berger, 1962; reported that due to micronutrient deficiency and soil moisture stress in surface soil reduced root growth, reduced transpiration, photosynthesis rate and also mineralization and availability of nutrients.…”

Section: Resultsmentioning

confidence: 99%

Response of Rainfed Soybean to Micronutrient Application in Vertisols

Yaduwanshi¹,

Unni²,

Khandkar³

2018

Int.J.Curr.Microbiol.App.Sci

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The present investigation was carried out in Kharif season during the year 2009 under All India Coordinated Research Project for Dryland Agriculture, College of Agriculture, Indore. A field experiment under rainfed conditions was laid out in randomized block design with twelve treatments at the College of Agriculture Farm, Indore in field No.19 during the Kharif season of 2009. The objectives of the study were: -To evaluate the response of application of micronutrient viz. Zn, Mo, B and Fe to soybean grown in Vertisols under rainfed condition; To evaluate comparative performance of soil and foliar application methods used for micronutrient application; To evaluate the effect of Micronutrient application on physiological processes of soybean such as photosynthesis, respiration, stomatal conductance, leaf temperature, and chlorophyll content. There were twelve treatments and each of them was randomized and replicated three times. The design used in the experiment was randomized block design. The gross plot size was 5.0 m X 4.0 m and after leaving non-experimental margin on both sides, the net experimental plot size was 4.00 m X 3.20 m. Soybean [Glycine max (L.) Merrill] crop (cv. JS-9305) was sown on July 1, 2009. The highest seed yield was recorded in the treatment T5-RDF+ Zn (Soil application) 25 Kg ZnSO4 (2471 kgha -1 ) followed by T3: RDF + Mo (Soil Application) 0.5 kg/ha (2450 kgha -1 ), T4: RDF + Mo (Foliar Application) 0.1% Amm. Molybdate (2376 kgha -1 ), T9-RDF + Fe (Soil Application)(2353 kgha -1 ), T10-RDF + Fe (Foliar Application) (2325, kgha -1 ), T7-RDF+ B (Soil Application) (2166kgha -1 ), T8-RDF + B (Foliar Application) (2128 kgha -1 ), T6-RDF + Zn (Foliar Application) (2209, kgha -1 ), T2-Recommended dose of NPKS (2034 kgha -1 ), T11-Organic manure @ 10 tha -1 (1831 kgha -1 ), and lowest in control (1731, kgha -1 ). All the treatments are statistically at par except the treatment T1 and T12 i.e. control and addition of organics alone. Seed yield data revealed that treatments comprising of soil application of micro nutrient gave higher seed yield when applied with RDF than foliar application of micronutrient. This statement is true for all the micro nutrients applied In case of straw yield also. Test weight and chlorophyll content in leaves were also affected significantly by different Treatments. In case of test weight treatments T2 (14.8g) gave the highest test weight. Lowest test weight was recorded in the treatment T1 control. The highest chlorophyl content was recorded in the treatment T3-RDF + Mo (Soil Application) (40.8 SPAD) which was closely followed by the treatment T4-RDF + Mo (Foliar Application) 0.1% Amm. Molybdate, T5-RDF+ Zn (Soil application), T7-RDF+ B (Soil Application). All these treatments were statistically at par with the treatment T3-T2 + Mo (Soil Application). While the treatment T3 was found statisticaly superior to the rest of the treatments. Soil application of micronutrient was found more economical than foliar application of micro nutrient. The lowest B: C ratio was obtai...

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“…This increase of weight could be the result of increased axillary shoots as a result of apical meristem termination. Bouma (1969) studied the effect of growing subterranean clover (Trifolium subterraneum) initially with a half strength B solution (0.001, 0.002, 0.004, or 0.032 mgÁL -1 ) for 7 d and then each B concentration was doubled for the next 7 d. Seedlings were then transferred into another container with the same complete fertilizer solutions containing either 0, 0.002, 0.004, 0.008, or 0.064 mgÁL -1 B. While Bouma (1969) reported a greater trend of increased shoot dry weight as compared with root dry weight when B was withheld, there was not a corresponding increase in shoot dry weight overall.…”

Section: Discussionmentioning

confidence: 99%

Nutrient Disorders of ‘Orchestra Pink’ Gloxinia

Cockson¹,

Henry²,

McCall³

et al. 2017

hortte

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To produce popular floriculture crops, such as gloxinia (Sinningia speciosa), growers must be equipped with cultural information including the ability to recognize and characterize disorders. Diagnostic criteria for nutrient disorders of gloxinia are absent from current literature. Therefore, gloxinia plants were grown in silica-sand culture to induce, characterize, and photograph symptoms of nutritional disorders. Control plants received a complete modified Hoagland’s all-nitrate solution, whereas nutrient-deficient treatments were induced with a complete nutrient formula minus a single nutrient. Boron toxicity was induced by increasing the element 10-fold higher than the complete nutrient formula. We monitored plants continuously to document and photograph sequential series of symptoms as they developed. Typical symptomology of nutrient disorders and critical tissue concentrations are presented. Of 13 treatments, 10 exhibited symptomology; copper, molybdenum, and zinc remained asymptomatic. Symptoms of nitrogen, phosphorus, potassium, magnesium, and sulfur deficiencies, plus boron toxicity manifested early; therefore, these disorders may be more likely problems encountered by growers. Unique symptoms were observed on plants grown in nitrogen, potassium, sulfur, and iron deficient and boron toxic conditions.

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Effects of Changes in Boron Nutrition on Growth and Development of Subterranean Clover

Cited by 10 publications

References 9 publications

Functional Boron Requirement for Leaf Expansion and Its Use as a Critical Value for Diagnosis of Boron Deficiency in Soybean

Functional Boron Requirement for Leaf Expansion and Its Use as a Critical Value for Diagnosis of Boron Deficiency in Soybean

Response of Rainfed Soybean to Micronutrient Application in Vertisols

Nutrient Disorders of ‘Orchestra Pink’ Gloxinia

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