Insufficient water is currently one of the environmental factors most limiting to crop yields and is likely to remain so even with global climate change. Although rising atmospheric carbon dioxide concentrations may substantially reduce stomatal
)] and psychological benefits ( Bringslimark et al., 2007 ; Lohr et al., 1996 ). There appears to be no published research on the aspect of indoor air quality: the impact of plants on removal of carbon dioxide from indoor environments. The principal
Nitrogen is an essential nutrient for plant growth. Nitrogen fertilization is the major feature of intensive agricultural management to improve crop yields ( Zhao et al., 2014 ; Zhu and Chen, 2002 ). Generally, manures are applied together with
substrate mixtures (hereafter “mixes”) were collected and analyzed to determine the carbon content of each mix. Organic carbon content (percent) was determined for five random samples of each mix using an elemental analyzer to separate nitrogen and carbon
Compost (2002) used by the STA program were positive. The pH, soluble salt content, total nitrogen, total carbon, carbon-to-nitrogen ratio, particle size, bioassay, and respirometry measurements of all samples were within the ideal and desirable ranges for
C concentration, N concentration, and C/N ratio of respective organs, i.e., shoot and roots, were similar to those of whole plant (data not shown). Fig. 2. Carbon (C) concentration, nitrogen (N) concentration, and C/N ratio in Phalaenopsis Sogo
corresponded to the amount of pruning wood typically observed on the ground from light to heavy pruning. The inorganic nitrogen (ammonium sulfate) treatment (N1) included rates of nitrogen at 15.2, 30.5, 45.7, and 61.0 kg·ha −1 to adjust the C : N ratio of
analyzed by one-way analysis of variance, P = 0.03 and P = 0.65 for fruit cell number and average cell size, respectively. Fig. 8. Leaf area to fruit ratio in response to nitrogen (N) supply ( A ) and average fruit weight at harvest in
.4%. Carbon:nitrogen ratios of 20 or less allow organic nitrogen to break down to an inorganic, plant-available form of nitrogen ( U.S. Composting Council, 2002 ). The carbon:nitrogen ratios of the samples were between 13.40 and 13.50. Therefore, the compost
sphagnum moss; back row planted in a medium consisting of 60% medium-size douglas fir bark, 20% perlite, and 20% coarse sphagnum peat ( Wang, 2008 ). Table 1. Effects of nitrate (NO 3 − ) to ammonium (NH 4 + ) nitrogen ratio on spiking and flower count on