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目的:确定陇中半干旱地区人工栽培柴胡最佳追施磷酸二铵的量。方法:采用单因素随机区组试验设计,选在柴胡拔节期进行磷酸二铵的追肥试验,测定柴胡生长动态和根中醇溶性浸出物、柴胡皂苷a、d含量以及药材产量。结果:追施磷酸二铵能显著提高药材中醇溶性浸出物的含量;随着追施量的增加,药材产量不断增加,但柴胡皂苷含量有降低趋势。栽培柴胡在第二年最佳追施磷酸二铵的量为25 kg/667m~2,在该追肥量下,柴胡产量为2613.40 kg/hm~2,根中醇溶性浸出物为30.42%,柴胡皂苷a为0.28%,柴胡皂苷d为0.34%。结论:陇中半干旱地区栽培柴胡磷酸二铵的最佳追肥量为25 kg/667m~2。
Objective: To determine the optimum amount of DAP for artificially cultivated Bupleurum in Longzhong semiarid area. Methods: The single-factor randomized block design was used to select the top-dressing test of diammonium phosphate in Bupleurum to determine the growth dynamics of Bupleurum chinense and the content of alcohol-soluble extract, saikosaponin a and d and the yield of medicinal herbs. Results: Topdressing ammonium phosphate could significantly increase the content of alcohol-soluble extract in medicinal materials. With the increase of topdressing amount, the yield of medicinal herbs increased continuously, but the content of saikosaponin decreased. In the second year, the optimum amount of DAP was 25 kg / 667 m ~ 2, the yield of Bupleurum was 2613.40 kg / hm ~ 2, the content of alcohol-soluble extract was 30.42% , Saikosaponin a 0.28%, saikosaponin d 0.34%. CONCLUSION: The optimum amount of top dressing for Bupleurum Chinensis DAP in Longzhong semiarid area is 25 kg / 667m ~ 2.