外文翻译---后期(非开花期)施用树脂包膜缓释肥对盆栽六出花后期生长、开花(编辑修改稿)

外文翻译---后期(非开花期)施用树脂包膜缓释肥对盆栽六出花后期生长、开花(编辑修改稿)内容摘要：

Bik and Van den Berg , 1981) . In Italy , greenhousegrowth Alstroemeria is fertilized with a NPK ratio of 2:: during vegetative growth。 this ratio is changed to 2:: as the crop approches flowering (Cocozza Talia and Farina , 1991) .In th United State , Alstroemeria plants may be fertilized with as much as 600 mg﹒ L1 of N as KNO3 twice weekly (Healy and Wilkins , 1991) . Flower production increases and flower initiation is hastened when N is applied an 400 mg﹒ L1 every 7 to 10d (Smith et al. , 1998) . Potted Alstroemeria can be produced using the cutflower crop fertilizer remendations . Madson (1995) , working with potted Alstroemeria hybrid Fl101 , showed that increasing P fertilization up to 74 mg﹒ L1 , applied at every irrigation during the production phase, increased subsequent yield of flower stems and total number of florets per stem in plants that received no further fertilization . She also observed that the medium was depleted of N, P, and K at the end of the flowering period, and suggested that the use of resincoated fertilizers (RCF) during the postproduction flowering season might benefit potted Alstroemeria. Argo and Biembaum (1993b) investigated the use of RCF to improve the garden performance of flowering hanging baskets. Applying an RCF as a topdressing to Impatiens wallerina Hook f. in 25cm baskets prior to placing them in an outdoor environment allowed the plants to flower until the end of August, while the production of blooms decreased rapidly in nonfertilized plants. Adequate fertilization of flowering potted plants throughout their postproduction life requires high rates of RCF incorporated in the medium prior to planting, but high preplant incorporation rates of RCF are injurious to saltsensitive plants such as New Guinea impatiens (impatiens hawkeri Bull.) and tuberous begonias (Begonia tuberhubrida Voss) (Argo and Bienbaum, 1993b). Since Alstroemeria is sensitive to high salt levels (Bridgen, 1992。 van der Krogt, 1991) preplant incorporation of RCF at levels adequate to sustain postproduction growth would probably be harmful. The objective of our research was to determine the effect of RCF, applied as a topdressing to marketable Alstroemeria potted plants, on postprouction flowering and growth. In the first experiment we pared the effect of fertilizers having different ratios of NPK and release periods。 in a subsequent experiment we pared the effect of there different concentrations of two fertilizers differing in NPK ratio and release period. These trials were intended to provide information to producers of potted plants, and to provide a basis for further investigation of effects of fertilization on growth and flowering in Alstroemeria. Materials and Methods Effect of NPK ratio and release time (). Divisions consisting of storage roots and rhizomes of the Univ. of Connecticut Alstroemeria hybrid FL101 were planted in pots using Pargro peatwool potting medium (Partex Industries, Phenix City , Ala.) in Jan. 1995. Plants were placed in greenhouse with heating setpoint at 10℃ and fan ventilation setpoint at 18℃ . Plants were fetilized every 2 weeks until Apr. 1995, alternating 17N1P20K and 15N0P14K formulations with a N concentration of 300 mg﹒ plants started flowering at t。