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Fiber hemp (Cannabis sativa L.) yield and its response to fertilization and planting density in China

文献类型： 外文期刊

作者： Tang, Kailei 1 ; Wang, Jiayin 1 ; Yang, Yang 1 ; Deng, Gang 1 ; Yu, Jian 2 ; Hu, Wanqun 3 ; Guo, Li 4 ; Du, Guanghu 1 ; Liu, Feihu 1 ;

作者机构： 1.Yunnan Univ, Sch Agr, Kunming 650500, Yunnan, Peoples R China

2.Xishuangbanna Dev Ctr Green Food & Rural Ind, Jinghong 666100, Peoples R China

3.Luan Agr Sci Res Inst, Luan 237001, Peoples R China

4.Heilongjiang Acad Agr Sci, Daqing Branches, Daqing 163316, Peoples R China

关键词： Hemp (Cannabis sativa L.); Yield performance; Fertilization rate; NPK ratio; Planting density

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：6.449； 五年影响因子：6.508 ）

ISSN： 0926-6690

年卷期： 2022 年 177 卷

页码：

收录情况： SCI

摘要： Interest is growing worldwide to grow fiber hemp for innovative biomaterials while little information is available on the yield performance and agronomy of hemp. In the present study, the productivity of fiber hemp in response to fertilization and planting density was assessed at three sites in the main hemp-producing areas in China with locally bred cultivars in 2016 and 2017. The sites were Daqing in the north-east, Lu'an in the central-east, and Menghai in the south-west. At each site, the treatments were a factorial combination of three fertilization rates (300, 600, and 900 kg (N + P2O5 + K2O) per hectare), two NPK ratios (N:P2O5:K2O at the ratio of 3:1:2 and 4:1:2), and two planting densities (45 and 67.5 plants m(-2)). The harvested stem yield ranges were 9.0-12.2 Mg ha(-1) in Daqing, 9.8-16.5 Mg ha(-1) in Lu'an, and 5.2-15.1 Mg ha(-1) in Menghai. Increasing the fertilization rate from 300 kg ha(-1) to 900 kg ha(-1) had little effect on the yields of stem, leaf and bark while it caused a decrease in the stem bark content in all sites. NPK ratio had a considerable effect on hemp stem yield, higher yield was achieved at 3:1:2 than 4:1:2. The effect of planting density on hemp yields varied among sites. Between the tested densities, the yields of biomass, stem and bark were higher at 45 plant m- 2 in Menghai, at 67.5 plants m- 2 in Lu'an while no significant difference was detected at Daqing. These results highlight the need to optimize fertilization and planting density according to environmental conditions.

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