scholarly journals Studies on Dry Matter Production of Soybean Plant : 2. Influence of light intensity on the photosynthesis of the population. : Part 1. Relation between photosynthesis and light receiving aspect of the population in case where light intensity varies with weather condition.

1965 ◽  
Vol 33 (4) ◽  
pp. 473-481 ◽  
Author(s):  
Atsuhiko KUMURA
Keyword(s):  
Light Intensity ◽  
Dry Matter ◽  
Weather Condition ◽  
Dry Matter Production ◽  
Soybean Plant ◽  
Matter Production

AN ANALYSIS OF DRY MATTER PRODUCTION OF DOUGLAS-FIR SEEDLINGS IN RELATION TO TEMPERATURE AND LIGHT INTENSITY

1967 ◽  
Vol 45 (11) ◽  
pp. 2063-2072 ◽  
Author(s):  
Holger Brix
Keyword(s):  
Light Intensity ◽  
Leaf Area ◽  
Dry Matter ◽  
Douglas Fir ◽  
Dry Matter Production ◽  
Dry Matter Distribution ◽  
Pronounced Increase ◽  
Light Intensities ◽  
Matter Production ◽  
Net Assimilation

Seedlings of Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) were grown in growth chambers under all combinations of three temperatures (13, 18, and 24 °C) and three light intensities (450, 1000, and 1800 ft-c). Dry matter production of leaves, stem, and roots was determined at 65 and 100 days after germination. The leaf area produced per unit of leaf dry weight and the dry matter distribution to the plant organs was measured. Net assimilation rates between the ages of 65 and 100 days were calculated. Rates of photosynthesis per unit of leaf were determined at different light intensities and temperatures, and rates of respiration of plant top and of roots were found for different temperatures.Increasing light intensity affected dry matter production in two opposing ways: (i) it increased the rate of photosynthesis per unit leaf area, and (ii) it decreased the leaf area added per unit of dry matter produced. A pronounced increase in growth with increase in temperature from 13 to 18 °C was a result of a temperature influence on production of leaf area rather than the effect of photosynthesis per unit of leaf. Net assimilation rates decreased with increase in temperature at all light intensities.

scholarly journals Study of Pasture Productivity for Semi-Intensive Cattle System during Dry Season in the South Konawe Regency, Southeast Sulawesi

2020 ◽  
Vol 44 (3) ◽  
Author(s):  
Ahmat Endang Two Sulfiar ◽  
Bayu Andri Atmoko ◽  
Budi Guntoro ◽  
I Gede Suparta Budisatria
Keyword(s):  
Carrying Capacity ◽  
Dry Matter ◽  
Smallholder Farmers ◽  
Weather Condition ◽  
Dry Season ◽  
Dry Matter Production ◽  
Pasture Production ◽  
Matter Production ◽  
Capacity Data ◽  
Pasture Productivity

This study was aimed to evaluate the characteristics and productivity of pasture for semi-intensive cattle system in South Konawe Regency during dry season. The study was conducted in August-September 2019 as dry season based on the weather condition and was determine by Department of Statistics Center of South Konawe Regency. A total of 55 selected smallholder farmers in two areas in South Konawe Regency, namely West Ranomento (30) and Konda (25) Districts. Data were obtained by interview to find out the farmers profile and pasture characteristics. Production was measured by forage sampling (1x1m) to calculate annual production. Samples were proximately analyzed to calculate dry matter production and the carrying capacity. Data were analyzed descriptively and statistically with an independent sample t-test. The botanical composition in both locations was highly dominated (>90%) by field grasses. The grassland ownership was not different between two areas. Grassland ownership at West Ranomento and Konda were 0.78±0.14 and 0.21±0.04 Ha/farmer, respectively. The pasture production between West Ranomento (2.27±0.10 ton/ha) and Konda District (1.76±0.05 ton/ha) was significantly different (p<0.05),. Pasture production and carrying capacity indicated that conditions in West Ranomento were significantly higher (p<0.05) compared to Konda District. The fresh forages production was 10.98±2.26 vs. 2.17±0.51 ton/year, forages that can be consumed was 3.30±0.67 vs. 3.30±0.67ton/year, dry matter production was 0.72±0.15 vs. 0.18±0.04 ton/year and carrying capacity was 0.22±0.04 vs. 0.05±0.01 AU/year respectively. It was concluded that the pasture productivity at the study area during dry season was very low based on productivity and carrying capacity.

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