外文翻譯---后期(非開(kāi)花期)施用樹(shù)脂包膜緩釋肥對(duì)盆栽六出花后期生長(zhǎng)、開(kāi)花(存儲(chǔ)版)
【正文】 在加熱溫度設(shè)置為 10℃ ，通風(fēng)風(fēng)扇溫度設(shè)置為 18℃ 的溫室中，以 N 濃度為 300mg﹒ L1 的 17N1P20K 配比和15N0P14K 配比的肥料每隔兩周交替施肥直至 1995 年 4月。五月中旬，植株開(kāi)始開(kāi)花，從中選出 35盆在、生長(zhǎng)一致的，并 7 盆一組分成 5 組。施用奧綠 19612，奧綠 18612 和 Polyon 19612 并不影響花莖總數(shù)。然而，對(duì)比顯示施以 Sierra HighN 2448 比奧綠19612 具有更多的花朵總數(shù)，低比率水平尤為顯著。 這兩個(gè)實(shí)驗(yàn)都證實(shí)了適于銷(xiāo)售的盆栽六出花可以在不用任何肥料的情況下開(kāi)花幾個(gè)月。與 Argo and Biernbaum(1993b)對(duì) Impatiens walletiana 后期表現(xiàn)的觀(guān)察一致，當(dāng) NPK 配方相近時(shí) RCF 的釋放有效期并沒(méi)有影響。 (Sierra highN 2448, 89 month release, The Scotts Co.) at low (), medium (), and high () concentrations, and the nonfertilized contol. Total N per unit volume for the low, medium, and high concentrations were , , ㎏ .mg3, respectively. The number of stems produced and number of florets per inflorescence were counted from 30 May to 11 . At the end of the experiment, the entire aerial portion of the plant was weighed and vegetative stems were counte. Both experiments were analyzed as randomized pleteblock designs. Analysis of variance was performed with the GLM procedure of the SAS statistical program (SAS Institute, Cary, .) Results and Discussion In parison with several RCF formulations(), the nonfertilized control produced the greatest number of florets but the least fresh weight and fewest vegetative stems (Table 1). Application of Osmocote 19612, Osmocote 18612, and Polyon 19612, did not affect the total number of floral stems produced. Only Osmocote 18612 and Polyon produced fewer florets per stem than the control treatment. Linear contrast showed that fertilizers with a NPK ratio of =9::5 (NP2O5K2O=1:1:1) produced significantly fewer floral stems than fertilizers with a NPK ratio of=7:3:6 (NP2O5K2O=3:1:2). Plants that were not fertilized were extremely chlorotic and spindly while all the plants treated with fertilizer were green and full. Fertilizers with lower P and k, such as Osmocote 19612, produced a yield of total floral stems and florets statistically equal to the nonfertilized control, but with significantly greater fresh weight and no chlorosis. Therefore, in the subsequent experiment we pared this fertilizer with HighN 2448, a fertilizer containing even lower concentrations of P and K. We also tested the effects of differet rates of fertilizer, corresponding to low, medium, and high rates based on the manufacturer’s label remendations. The yield in total number of floral stems ranged from to , but differences were nonsignificant. However, contrasts showed that plants fertilized with Sierra HighN 2448 yielded more total florets than those fertilized with Osmocote 19612, particularly at the low rate. Plants fertilized with Osmocote 19612 were heavier and had more vegetative stems than those fertilized with Sierra HighN 2448 (Table 2). Fresh weight and number of vegetative stems increased with increasing rate of fertilization, with the highest response to a high rate of Osmocote 19612. At the end of the experiment, the nonfertilized plants were very small, chlorotic, and had few stems, but were still flowering. Plants that receive the low rate of either fertilizer exhibited some chlorosis on the lower leaves. Plants were smaller and produced fewer flowers in the second expriment than in the first, because the production phase was shorter and the plants wre smaller at the time of RCF application. Argo and Biernbaum (1993b) demonstrated that topdressi
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