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(四)香石竹 对香石竹营养的研究业已多年了。Davidson以砾石培养香石竹,并提出了在商业性栽培条件下,生产优质花朵所需N、P、K、Ca、Mg的施用量(表6)。 表6 香石竹的推荐施肥量 资料来源:Davidson,1946。 Post(1952)讨论了香石竹的营养问题,并根据“促生试验”,推荐土壤的营养水平为NO_3~-25—150毫克/升,P5—10毫克/升及K25—50毫克/升。 Laurie等(1968)建议,用来栽培香石竹的土壤,含Ca量为200毫克/升,N50毫克/升,P5毫克/升及K30毫克/升,PH值为6.0—7.0,可以使植株生长良好。此外,香石竹对土壤中缺硼是敏感的,故每年应施一次含硼4克/1000升的硼砂液。
(D) carnation on the carnation nutrition research for many years. Davidson cultured carnation with gravel and proposed the application rates of N, P, K, Ca, Mg needed to produce good-quality flowers under commercial cultivation (Table 6). Table 6 Recommended dosages of carnation Sources: Davidson, 1946. Post (1952) discussed the nutritional issues of carnation and, according to the “pro-life test,” recommended soil nutrient levels of NO_3 ~ -25-150 mg / L, P5-10 mg / L and K25-50 mg / L. Laurie et al. (1968) suggested that the soil used to grow carnation could contain 200 mg / L of Ca, 50 mg / L of N, 5 mg / L of P and 30 mg / L of K at a pH of 6.0-7.0 to plant growth good. In addition, carnation is boron-sensitive to the soil, it should be applied once a year, 4 grams of boron / 1000 liters of borax.