氮磷钾配施对大麻产量和养分利用效率的影响

以云麻1号为材料,采用“3414”设计部分实施田间试验,研究氮磷钾配施对生理指标、农艺性状及养分利用效率的影响,为工业大麻高产高效栽培的合理施肥提供参考.试验结果显示,养分利用效率随施肥量增加而降低,以中氮-低磷-中钾处理的养分利用效率较为理想;中氮-低磷-中钾配施使氮素的代谢与同化水平加强,干物质分配更合理,麻皮增厚,麻皮干物比重增加,麻皮产量较高.据此认为,氮磷钾肥料对工业大麻生长的影响是多方面的,其用量及配比应综合考虑农艺指标和养分利用效率来确定.

Effects of combined application of N,P and K fertilizers on yield and nutrient efficiency of industrial hemp(Cannabis sativa L.)

Based on the “3414” partial field experiment,effects of combined application of N,P and K fertilizers on physiology and agronomic traits,as well as nutrient efficiency of industrial hemp cultivar Yunnan hemp 1 were investigated to provide reference for rational fertilization in industrial hemp cultivation.The results showed that N,P and K nutrient efficiency decreased by the increase of the fertilizer.The best nutrient efficiency was observed with the combination of moderate N,low P and moderate P.This combination of N,P and K fertilization significantly promoted nitrogen metabolism and assimilation,optimized dry matter distribution,increased the dry matter in the bast and the thickness of bast,therefore,increased the bast fiber yield.It is concluded that N,P and K fertilizers affect the growth of industrial hemp in many ways,so the amount of fertilizers and the balance amount of different fertilizers should be determined by consideration of crop yield and nutrient efficiency.