Eight plant bed fertilizer treatments (N–P–K) were evaluated for the effect on plant production and sweetpotato yield. The treatments ranged from 0–0–0 to 450–450–450 lb/ac. `Beauregard' roots were bedded. After the first plant cutting, 50 lb/ac 34–0–0 was applied to half of the beds. For the second cutting, the 0N–0P–0K treatment without additional N produced plants with less green weight compared to the other treatments; there were no differences between the other 15 treatments. For the first plant cutting, 150–150–150 and 150–300–450 lb/ac produced plants with less green weight compared to 0–0–0, 75–150–300, 300–450–600, and 450–450–450 lb/ac. There were no differences in sweetpotato yield due to plant bed fertilization.
`Blue Ridge' snap beans were planted with no fertilizer or banded rates of 560 kg ha-1 of a 10-4.4-8.3 fertilizer on soils with medium fertility in 1990 and 1991. Foliar applications of water soluble fertilizers containing nitrogen, phosphorus, and potassium were made at early bloom and in split applications at early bloom and repeated 10 days later. No response to fertilizer banded at planting or to foliar nutrient applications was found in snap bean yields or pod quality. Most fertilizer applications at planting increased plant size and lodging in 1990, but not in 1991. With the use of a rotation schedule and winter cover crops, snap beans showed no response to fertilization on soils of medium fertility.
collected leachate samples. Expt. 1: Effects of the presence of plants and fertilization on acidification of the sphagnum moss. This experiment was a 2 × 2 factorial arrangement having two fertilizer treatments (with or without fertilization) each with or
34 WORKSHOP 2 (Abstr. 672-673) Nutrient Balances in Horticultural Ecosystems: Optimizing Fertilization and Maximizing Environmental Protection Monday, 24 July, 10:00 a.m.-12:00 noon
The effectiveness of varying rates and timing of applied primary plant nutrients as a completely soluble N-P-K fertilizer through a drip/trickle low volume irrigation system was studied during 1991 on eggplant (Solanum melongena cv. Harris Special Hibush). Before the drip irrigation tubing and black plastic mulch were laid on a coastal plain sandy loam soil, plots were treated with 0, 22, 45, and 67 kg ha-1 of nitrogen (N), phosphate (P2O5) and potash (K20). The higher rates of preplant fertilization did have a significant beneficial effect on total seasonal yields of quality eggplants. The preplant treatments also had an influence on mid and late season production. As the frequency of drip/trickle applied primary plant nutrients increased up to 6 seasonal applications, the total quality fruit production substantially increased. Frequency of applications also had an influence on seasonal yields. Applying increased rates of the primary plant nutrients at a low seasonal frequency of 3 applications had little influence on increasing total quality yields of eggplants. Individual quality fruit was significantly heavier from plants which received 5 to 6 applications of the soluble N-P-K fertilizer than from plants which received no fertilizer through the drip/trickle irrigation system for the season.
Producers of floriculture crops strive to cultivate compact and healthy plants that are considered high quality and attractive for consumers. The fertilization regimen has a significant role in the ultimate appearance and robustness of a crop. Many
fertilization or crop production on appropriate soils that lead to the accumulation and concentration of Se in food sources. Brassica vegetables have received considerable attention as a result of their chemopreventive properties that are mainly attributed to
34 WORKSHOP 2 (Abstr. 672-673) Nutrient Balances in Horticultural Ecosystems: Optimizing Fertilization and Maximizing Environmental Protection Monday, 24 July, 10:00 a.m.-12:00 noon
Fertilization requirements for establishment of shrubs in the landscape have received limited attention in part because woody dicots often perform well with little or no supplemental fertilizer ( Broschat et al., 2008 ). However, much of the
Tea [ C. sinensis (L.) O. Ktze] is a kind of traditional economic crop in southern China, and tea industry can quickly promote the local economy development ( Zhang et al., 2010 ). Fertilization is an effective way to supply nutrients for tea tree