BACKGROUND Plant leaves, as the main photosynthetic organs and the high energy converters among primary producers in terrestrial ecosystems, have attracted significant research attention. Leaf lifespan is an adaptive characteristic formed by plants to obtain the maximum carbon in the long-term adaption process. It determines important functional and structural characteristics exhibited in the e...

Two experiments were conducted to evaluate effects of barley grains particle size on ruminal pH and ammonia concentration of rams (experiment 1) and carcass characteristics (experiment 2) of male lambs fed high urea diet. Treatments in two experiments were (1: basal diet + whole barley grains, 2: basal diet + ground barley grains with a 5 mm screen, 3: basal diet + ground barley grains with a 3...

BACKGROUND AND AIMS Grazing is a complex process involving the simultaneous occurrence of both trampling and defoliation. Clonal plants are a common feature of heavily grazed ecosystems where large herbivores inflict the simultaneous pressures of trampling and defoliation on the vegetation. We test the hypothesis that physiological integration (resource sharing between interconnected ramets) ma...

IN ARKANSAS, 'Concord' grapevines trained to the Geneva Double Curtain system have consistently produced larger yields than vines trained to the bilateral cordon or Umbrella Kniffen systems [Ark. Farm Res. 28(5):12; 1978]. However, information was needed on the influence of pruning severity, cane length and shoot positioning on yield and juice quality as determined by percentage of soluble soli...

Effects of a mixture of the postemergence herbicides acifluorfen and bentazon, and simulated defoliation expected from green cloverworm on population densities of Heterodera glycines were determined in field plots in Iowa. The herbicide mixture and defoliation each suppressed soybean growth. Population densities of H. glycines were generally lower in herbicide-treated than untreated plots. Popu...

Common bean is an important crop, consumed as green-shelled in several countries. In Chile, beans are cultivated often a dry land vulnerable to drought. The objective of this study was characterize the hydric and productive responses four genotypes subjected deficit irrigation order outline production strategies face increasing water scarcity. Two experiments were evaluated: one pot experiment ...

The experiment was conducted to evaluate the effect of defoliation on grain and fodder yield maize at research field laboratory Crop Physiology Ecology Department, Hajee Mohammad Danesh Science Technology University, Dinajpur during period December 2018 June 2019. trial carried out in a randomized completely block design with three replications. experimental treatments were: T1– Control (withou...

The increasing worldwide interest in renewable energy and carbon storage has led to the development of relatively fast solutions obtain wood biomass. cultivation fast-growing tree species short-rotation crops, such as hybrid poplar clones, is one solution, at least temperate areas. Sometimes these monocultures are affected by disturbing factors, including severe insect defoliation, with strong ...

At the end of the growing season in late July, 20-month-old cork oak (Quercus suber L.) saplings were partially defoliated (63% of leaf area) to evaluate their ability to recover leaf area after defoliation. At 18 and 127 days after defoliation, changes in starch and nitrogen pools were determined in leaves and perennial organs, and variations in photosynthetic carbon uptake were investigated. ...