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Chinese Agricultural Science Bulletin ›› 2018, Vol. 34 ›› Issue (6): 70-74.doi: 10.11924/j.issn.1000-6850.casb17020026

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Effects of Different Fertilization Rates and Planting Densities on Yield of Rheum lhasaense

  

  • Received:2017-02-08 Revised:2017-03-30 Accepted:2017-04-17 Online:2018-02-26 Published:2018-02-26

Abstract: To provide high quality medicinal materials for new drug development of Kunming Pharmaceutical Corporation, the authors studied the introduction cultivation of Rheum lhasaense from Tibet and the effects of different fertilization rates and densities on its yield. The L9 (34) orthogonal experiment of fertilization rate and planting density was applied with a total of four tested factors: N, P, K application rate and planting density, each factor had three different levels. The intuitive and variance analysis method were used to analyze the fresh root yield of Rheum lhasaense. The results showed that the effect on yield followed the order of N rate > K rate > planting density> P rate, and the effects of N rate, K rate and planting density on yield reached extremely significant level (P <0.01). For Rheum lhasaense planting in Lijiang area of Yunnan, the proper fertilization rate was N 450 kg/hm2, P2O5 0 kg/hm2, K2O 450 kg/hm2 and the suitable planting density was 90000 plants/hm2.

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