Sorghum Growth Case Study

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growth model of the sorghum development has been an ongoing attempt in several centers at the global levels. Seed germination and seedling establishment We have observed that, there is a drastic mismatch between the germination percentages of the seed planted in the lab condition and field condition. It depends on the nature of germination, emergence and seedling establishments of the plants. Blum, 2013, reported that only 33% to 51% of sorghum seed planted in the field will transform into an established plant and others remain unable to attain the whole plant stature (Figure 10). Dormancy This is the resting period of the plants or plant parts. Seed dormancy is the delayed germination of the freshly harvested seeds. It is a very…show more content…
Their growth rate will vary according to environment and genetic factors (Figure 12). • Blum et al., 1977, reported that root initiation rate is cyclical and it reaches the rate up to 1.5 roots per day. • Wilson 1988, reported that the effect of the most common environmental factors, such as water, available nutrients, perception of light and ambient CO2 concentration, root growth can be explained reasonably well by its relationship to shoot growth. Canopy of the sorghum The productivity of the plants can be measured by the dry matter produced by the above ground part of the plant. Accumulation of the dry matter produced is the function of radiation intercepted by the canopy and its efficiency of conversion. Partitioning of assimilates into different economic plant parts will determine the total amount of the dry matter invested in that particular economic part. The final canopy architecture of the sorghum canopy can be measured by the leaf number per plant, leaf size, leaf senescence and density of the plant and their stratification in the…show more content…
He suggests that soil conditions may be sensed by the shoot via. three major endogenous plant hormones, which are produced in the root, such as ABA, Ethylene and Cytokinins. • A scientist reported that the maximum LAI of sorghum is normally around 4 to 6 m2m-2 and it may reach up to 10 m2m-2 in sorghum planted under higher density and higher fertile soils. Biomass accumulation This is universally accepted that the growth curve of the plants followed the sigmoid curve. Similarly sorghum displays the typical sigmoid growth curve. Before the heading the Leaf Area Index will be maximized. • Reduced rate of LAI after its achieving the heading is dependent of its genotypes used and surrounding stresses of the biotic and abiotic approaches. • The stem dry weight of the sorghum continues to increase even after the heading and grain maturity (Vietor and Miller, 1990). • Huda et al., 1984, reported that rate of the productivity of the sorghum is about 3 g of dry matter per megajoule of PAR absorbed. Harvest

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