The influence of soybean planting density on dinitrogen fixation and yield

Kapustka, Lawrence A.; Wilson, Kenneth G.

doi:10.1007/bf00032407

Cited by 8 publications

(7 citation statements)

References 28 publications

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“…Nodule dry weight was not correlated with plant biomass, or with the N accumulated at V4, but was significantly correlated at R5 (both with p < 0.0001) (data not shown), indicating that increased nodule mass in low-density treatments was related to higher rates of nitrogen fixation. In contrast, Kapustka and Wilson (1990) found that an increase in soybean plant density reduced nodule number and dry weight per plant, but maintained high specific activity per nodule, which resulted in the same values of nitrogen fixation per plant.…”

Section: Discussionmentioning

confidence: 76%

Plant densities and modulation of symbiotic nitrogen fixation in soybean

Luca

Hungría²

2014

Sci. agric. (Piracicaba, Braz.)

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Soybean nitrogen (N) demands can be supplied to a large extent via biological nitrogen fixation, but the mechanisms of source/sink regulating photosynthesis/nitrogen fixation in high yielding cultivars and current crop management arrangements need to be investigated.We investigated the modulation of symbiotic nitrogen fixation in soybean [Glycine max (L.) Merrill] at different plant densities. A field trial was performed in southern Brazil with six treatments, including non-inoculated controls without and with N-fertilizer, both at a density of 320,000 plants ha −1 , and plants inoculated with Bradyrhizobium elkanii at four densities, ranging from 40,000 to 320,000 plants ha −1 . Differences in nodulation, biomass production, N accumulation and partition were observed at stage R5, but not at stage V4, indicating that quantitative and qualitative factors (such as sunlight infrared/red ratio) assume increasing importance during the later stages of plant growth. Decreases in density in the inoculated treatments stimulated photosynthesis and nitrogen fixation per plant. Similar yields were obtained at the different plant densities, with decreases only at the very low density level of 40,000 plants ha −1 , which was also the only treatment to show differences in seed protein and oil contents. Results confirm a fine tuning of the mechanisms of source/sink, photosynthesis/nitrogen fixation under lower plant densities. Higher photosynthesis and nitrogen fixation rates are capable of sustaining increased plant growth.

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Section: Discussionmentioning

confidence: 76%

Plant densities and modulation of symbiotic nitrogen fixation in soybean

Luca

Hungría²

2014

Sci. agric. (Piracicaba, Braz.)

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“…They stated that, at lower plant densities the photosynthetic rate per plant increased and, consequently, higher carbon (C) supplied to the nodules resulted in an increase in nodulation and in nitrogen fixation rates. Kapustka and Wilson (1990) also found out that, an increase in soybean plant density reduced nodule number. The lower nodule per plant for local variety interaction with row spacing in compare with nasir and goberesha interaction with all tested row spacing might be from nature of the variety.…”

Section: Resultsmentioning

confidence: 85%

Evaluation of common bean varieties (Phaseolus vulgaris L.) to different row-spacing in Jimma, South Western Ethiopia

Merga

2020

Heliyon

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This study evaluated the effect of row spacing on growth, yield and yield components of common bean varieties at Jimma. The objectives of the study were (i) to evaluate the best performed common bean variety (ii) to determine the optimum row spacing for different common bean varieties under the test environment. The experiment was laid out in randomized complete block design (RCBD) in factorial arrangement with three replications. A combination of three common bean Varieties (Nasir, Goberesha and Local Asendabo) and row spacing at four levels (30, 40, 50, 60cm) were used as experimental treatments. Leaf number was significantly varied between the varieties; whereas row spacing significantly influence leaf area index. The main effect of row spacing and the interaction effect did not show significant influence on both. Hundred seed weight and number of seed per pod were varied between the varieties and row spacing. Hundred seed weight was increased with row spacing. Pod number per plant, nodule number per plant, grain yield and harvest index was significantly affected row spacing, variety and their interactions. Grain yields increased with plant population assuming a parabolic curve to the plant density of both determinate varieties at 40cm row spacing. The highest yield for variety-Nasir and variety-Goberesha were observed at40 cm row spacing; whereas the highest yield for the local variety was recorded at 50 cm row spacing.

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“…In other instances, however, as population increased, the number of branches per plant (Blumenthal et al 2005), yield per plant (Ball et al 2000), pod and seed number per plant, and seed weight per plant (Boquet 1990) decreased. Population or Row spacing also influenced lodging, weed resurgence and N fixation (Herbert and Litchfield 1984, Kapustka and Wilson 1990, Yelverton and Coble 1991, Blumenthal et al 2005; weed resurgence increased as Row spacing increased (Yelverton and Coble 1991).…”

Section: Introductionmentioning

confidence: 99%

Row and Plant Spacing Effects on Yield and Yield Components of Soya Bean Varieties Under Hot Humid Tropical Environment of Ethiopia

Worku¹,

Astatkie²

2011

Journal of Agronomy and Crop Science

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Appropriate plant density is a key for gainful production of soya bean in various environments including the hot‐humid tropical environments (HHTE) of Ethiopia. A split‐plot factorial experiment was conducted under HHTE in south‐west Ethiopia to determine the effect of Variety (Clark, CSC‐1), Row spacing (50, 55, 60, 65, 70 cm) and Plant spacing (2.5, 5, 10 cm) on yield and yield components, and weed infestation of soya bean. The effect of Plant spacing was more Variety‐specific than that of Row spacing. Yield and yield components per m2 were significantly affected by both Row spacing and Plant spacing. However, per plant and per pod responses and weed infestation were affected mainly by Plant spacing, and not that much by Row spacing. Seed yield and yield components per m2 were the highest for the highest plant density (50 cm Row spacing, 2.5 cm Plant spacing), but individual plant and pod responses, and weed infestation were the highest for wider Plant spacing (10 cm). Regression analysis of various responses on planting density showed negative, cubic relationship albeit with different strength. This study demonstrated that these factors significantly modify soya bean yield and yield components as well as weed infestation, suggesting that they could be used as management tools for increased yield in HHTE.

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The influence of soybean planting density on dinitrogen fixation and yield

Cited by 8 publications

References 28 publications

Plant densities and modulation of symbiotic nitrogen fixation in soybean

Plant densities and modulation of symbiotic nitrogen fixation in soybean

Evaluation of common bean varieties (Phaseolus vulgaris L.) to different row-spacing in Jimma, South Western Ethiopia

Row and Plant Spacing Effects on Yield and Yield Components of Soya Bean Varieties Under Hot Humid Tropical Environment of Ethiopia

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