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以荷兰彩椒品种‘Mandy’为试材,对温室无土栽培彩椒进行2.5、5.0、10.0(CK)、15.0、20.0μmol/L(以N2.5、N5.0、N10.0、N15.0、N20.0表示)5个不同氮素水平处理,研究其对彩椒生长、产量、干物质及全氮含量的影响。结果表明:单株全氮含量依次为N15.0(1.6148g)>N20.0(1.5000g)>N10.0(1.4500g)>N5.0(1.4132g)>N2.5(1.3670g)。株高在N2.5~N15.0氮素处理浓度范围内,随浓度增加呈递增趋势,而在N15.0~N20.0处理浓度范围内则呈递减趋势;单株叶片数依次为N10.0>N15.0>N5.0>N20.0>N2.5;单株叶面积依次为N15.0>N20.0>N10.0>N5.0>N2.5。各个器官中的氮素分配比例不受不同氮素水平处理的影响,而不同器官中全氮含量则不同。干物质积累方面,在结果期,根部和叶片随氮的增加而增加,果实以施氮量少的增加明显,茎的各处理间差异不明显;在成熟期,茎和叶片随氮的增加而下降,果实随氮的增加呈明显上升趋势,根的各处理间差异不显著。产量依次为N15.0>N5.0>N10.0>N20.0>N2.5。试验认为温室无土栽培彩椒最佳氮素施用浓度为15.0μmol/L。
The pepper varieties ’Mandy’ were used as materials to test the soilless cultivated sweet pepper in the greenhouse with 2.5, 5.0, 10.0 (CK), 15.0, 20.0μmol / L (N2.5, N5.0, N10.0, N15 .0, N20.0) to investigate the effect on the growth, yield, dry matter and total nitrogen content of pepper in five different nitrogen levels. The results showed that the total N content of single plant was N15.0 (1.6148g)> N20.0 (1.5000g)> N10.0 (1.4500g)> N5.0 (1.4132g)> N2.5 (1.3670g). The plant height increased with increasing concentration of nitrogen in the range of N5 ~ N15.0, while decreasing with the increasing of N15.0 ~ N20.0 concentration. The number of leaves per plant was N10. 0> N15.0> N5.0> N20.0> N2.5; the leaf area per plant was N15.0> N20.0> N10.0> N5.0> N2.5. The proportion of nitrogen in different organs was not influenced by different nitrogen levels, but the content of total nitrogen in different organs was different. In terms of dry matter accumulation, the roots and leaves increased with the increase of N during the fruit period, and the increase of N application rate was obvious. There was no significant difference between the treatments of stems. During the maturity period, Decreased, the fruit increased with the increase of nitrogen was significantly increased, the root of the difference between the treatments was not significant. The yields were N15.0> N5.0> N10.0> N20.0> N2.5. The results showed that the optimal concentration of nitrogen for soilless culture pepper in greenhouse was 15.0μmol / L.