Temperature and Humidity Effects on the Growth and Yield of Pea Cultivars

Nonnecke, I. L.; Adedipe, N. O.; Ormrod, D. P.

doi:10.4141/cjps71-094

Cited by 24 publications

(19 citation statements)

References 1 publication

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“…Excellent fit of the data to the exponential equation is indicated by the large r 2 and the small error of estimate. The critical level of dt max of 27C suggested by Lambert and Linck (1958) and Nonnecke et al (1971) is supported.…”

Section: Resultsmentioning

confidence: 66%

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Field Response of Peas to Excess Heat during the Reproductive Stage of Growth

Pumphrey¹,

Ramig²

1990

jashs

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Regression analysis was used to establish the effect of maximum daily temperatures on fresh pea (Pisum sativum L.) yield during the reproductive stage of growth. Maximum daily temperatures below 25.6C had little influence on pea yield. Temperatures above 25.6C depressed yield; this adverse effect increased exponentially as maximum daily temperature increased linearly. Predicted decrease in fresh pea yield ranged from 16 kg/ha per heat degree day above 27C to 67 kg/ha per heat degree day above 35C.

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Section: Resultsmentioning

confidence: 66%

“…optimum temperature. Lambert and Linck (1958) and Nonnecke et al (1971) suggested 27C as a critical level for maximum daily temperatures (dt max ). Wang (1962) gave 25 to 26C as an upper optimum during blooming and 36C as the upper threshold where growth ceased.…”

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confidence: 99%

Field Response of Peas to Excess Heat during the Reproductive Stage of Growth

Pumphrey¹,

Ramig²

1990

jashs

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“…This is in agreement with earlier findings. As is known, the flowering and pod filling periods in pea are the most sensitive periods to drought stress, and significant reductions in pod and seed number have been reported when stress occurs during these states (Nonnecke et al 1971, Ney et aI.1993, Dumouiin et al 1994, Biarnes-Dumoulin et al 1996. Seeding rate had little effect on pod and seed number per plant.…”

Section: Yield Componentsmentioning

confidence: 99%

Effect of Sowing Season and Seeding Rate on the Morphological Traits and Yields in Pea Cultivars of Differing Leaf Types

Uzun

Acikgoz

1998

J Agronomy Crop Science

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The efifects of three seeding rates (25, 50, and 100 seeds m"") on several morphological traits, and dry matter, seed and protein yields were evaluated in two leafed, two semi-leafless and two tare-leaved pea {Pisum sativum L.) cultivars, with fall and spring sowing for 3 years. The experiments were conducted under rain-fed conditions in the Bursa Region of Turkey.Sowing season, seeding rate and cultivar type had a significant effect on most of the measured traits and the yield determinants. The actual number of seedlings per unit area varied greatly among varieties, sowing seasons and climatic conditions during emergence. Fall sowings had taller plants, and more pods and seeds per plant. The number of tillers per plant usually increased with declining seeding rate. Semi-leafless varieties had improved standing ability particularly at higher seeding rates and fall sowing conditions. The harvest index was higher for short strawed, tare-leaved varieties than both leafed and semi-leafless varieties. Harvest index was hardly affected by sowing season and seeding rate.In general, fall sowings and the highest seeding rate produced the highest dry matter, seed and protein yields in all pea cultivars. The yields of spring sowings varied greatly, primarily depending on the amount and distribution of the spring rainfall. In the wet spring of 1993, dry matter, seed and protein yields from spring sowing was higher than those of fall sowings for ali varieties. The semi-leafiess pea varieties. Countess and Niva, presented a clear advantage in the yield determinants under Bursa rain-fed conditions.

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“…1997), delaying flowering and producing abnormal flowers (Cockshull & Kofranek 1994). It has been suggested that high temperature and humidity within the floral chamber may have a negative effect on pea growth (Nonnecke, Adedipe, & Omrod 1971) and could also affect pollinators in naturally growing flowers (Martinez del Rio & Burquez 1986).…”

Section: Introductionmentioning

confidence: 99%

The cooling of convolvulaceous flowers in a tropical environment

Patiño

Grace

2002

Plant Cell & Environment

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The temperatures of flowers of Ipomoea pes-caprae ssp. brasilensis , Ipomoea aquatica and Merremia borneensis in bright sunshine, were studied to determine the role of corollas and sepals in cooling the gynoecium. The corollas and sepals were prevented from transpiring by greasing, to investigate the extent of evaporative cooling. In the exposed natural habitats of these flowers the maximum temperatures of air and soil were high (32 and 42 °°°° C, respectively) and corolla, sepal and gynoecium temperatures were often intermediate. Despite being almost astomatous, significant evaporative cooling was observed in the corolla. Between 20 and 80% of the energy absorbed by the corollas was dissipated as evaporation. The sepals were stomatous and their evaporative cooling was very important in reducing the temperature of the gynoecium. The temperatures of the non-transpiring gynoecia and corollas were significantly higher than the temperatures of the normally transpiring corollas and gynoecia. Furthermore, the gynoecia temperatures were significantly higher with nontranspiring corollas than with normally transpiring corollas, suggesting that the corollas alone play a role in maintaining the gynoecium within optimal temperatures levels. It was shown in an incubation experiment that temperatures exceeding 32 °°°° C may damage the carpels, and temperatures exceeding 42 °°°° C may damage sepals. Pollen grains were killed after 200 min of exposure to temperatures in the range 32 to 47 °°°° C. It is concluded that the cooling mechanisms (evaporation and self-shading) are critical for the reproductive success of these flowers in their natural environment.

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Temperature and Humidity Effects on the Growth and Yield of Pea Cultivars

Cited by 24 publications

References 1 publication

Field Response of Peas to Excess Heat during the Reproductive Stage of Growth

Field Response of Peas to Excess Heat during the Reproductive Stage of Growth

Effect of Sowing Season and Seeding Rate on the Morphological Traits and Yields in Pea Cultivars of Differing Leaf Types

The cooling of convolvulaceous flowers in a tropical environment

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