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研究了施用N、P、NP、NPK不同肥料处理对12年生丹桂(Osmanthus fragrans)生长、花量、叶片解剖结构及光合作用的影响。结果表明:不同施肥处理对桂花株高、冠径、新梢平均生长量、比叶重和单叶面积的表现为NPK>NP>N>P>对照,单株全年花量以施NPK最高,其次为NP和P,以纯N肥最低。对叶片厚度的影响表现为NPK>NP>N>对照>P,各施肥处理的栅栏组织厚度均比海绵组织高,海绵组织除施N肥比对照高外,其他处理均比对照低,叶片紧密度均比对照高。4—8月各处理叶绿素含量和光合作用均表现出NPK>NP>N>P>对照,14时Fv/Fm值表现为施NPK>NP>P>对照>N。建议在农业生产中增施N肥促进树体生长的同时,配施P、K肥,达到提高早期产量的目的。
The effects of different N, P, NP and NPK fertilizers treatments on the growth, flowering rate, leaf anatomy and photosynthesis of 12-year-old Osmanthus fragrans were studied. The results showed that the NPK> NP> N> P> CK> CK> CK> CK> CK, the average shoot growth, specific leaf weight and single leaf area under different fertilization treatments were the highest, , Followed by NP and P, the lowest pure N fertilizer. The results showed that NPK> NP> N> control> P, the thickness of palisade tissue was higher than that of spongy tissue, while the spongy tissue except N fertilizer was higher than the control, the other treatments were lower than the control, the leaves were tight Degree higher than the control. NPK> NP> N> P> CK> CK> NP> NP> NP> NP> NP> NP> NP> NP> NP> NP. Proposed to increase N fertilizer in agricultural production to promote the growth of trees at the same time, with P, K fertilizer, to achieve the purpose of improving early yield.