Effects of Cultivation Measures on Security and Seed Quality of Industrial Hemp in Zhangjiachuan
Industrial hemp is an important economic crop in Zhangjiachuan,Gansu Province.How-ever,the high-quality development of the industry is restricted by the variety degradation.We obtained the rejuvenated plants of the local variety,Zhangchuan Hemp in previous study.In order to identify the security and seed quality of the rejuvenated crop,an orthogonal test with plant density,fertilization re-gime and mulching methods was conducted.The THC and CBD content of inflorescence and leaves and the content and yield of seed protein and oil were measured.The results showed that:the THC content was reduced by rejuvenating of the variety and cultivation measures had a little effects on the THC con-tent,which implied that the security of the rejuvenated variety was significantly improved.Although the cultivation measures were also had little effects on the protein and oil content of hempseed,the yields were obviously affected by fertilization regime.To achieve a higher return on investment,45.00×104 plant/hm2 of plant density with 70.5-15-9 kg/hm2 of N-P2O5-K2O application rate was suggested for industrial hemp cultivation in Zhangjiachuan.
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