不同品种紫云英在湖北省不同生态区的生长及物质养分积累比较

Effect of different ecological areas of Hubei province on Chinese milk vetch of different varieties growth and nutrition accumulation

大田试验条件下,比较不同品种紫云英在湖北省单季稻区(洪湖)和双季稻区(黄陂)的差异,为不同区域适宜品种的选择提供依据。不同品种在洪湖的单株分枝数、单株复叶数均高于黄陂,而株高、表观叶面积均低于黄陂。不同品种在同一生态区的干物质量存在差异,洪湖以丰城青杆种最高,达1 914 kg/hm2,黄陂以弋江种最高,达1 864 kg/hm2。相同品种在不同生态区的产量也存在差异,大桥种、余江大叶种、丰城青杆种、粤肥2号的产量表现为洪湖高于黄陂,而其余品种则低于黄陂。不同生态区紫云英养分积累量存在差异,洪湖丰城青杆种的碳、氮、钾积累量最高,弋江种的磷积累量最高,黄陂弋江种的各养分积累量均最高。单季稻区应优选丰城青杆种,双季稻区优选弋江种。

The field experiment was carried out to study the difference among the seven varieties of Chinese milk vetch in the two ecological areas,hoping to select the optimum variety for different areas.The results showed that the branches and compound leaves per plant of the Chinese milk vetch in Honghu were higher than Huangpi＇s,but the shoot height and apparent leaf area of Chinese milk vetch in Huangpi were higher than Honghu＇s.The dry matter yield of different varieties in the same area were also discrepancy,the yield of Fengcheng were highest in Honghu,arrived at 1 914 kg/hm2,and the yield of Yijiang were highest in Huangpi,arrived at 1 864 kg/hm2.The dry matter yield of the same variety were different in two areas,the yield of Daqiao,Yujiang,Fengcheng and Yuefei in Honghu were higher than Huangpi＇s,and others were lower than Huangpi＇s.The nutrients contents of Chinese milk vetch were different in the two areas,N contents of Chinese milk vetch in Huangpi were higher than Honghu＇s,but P,K contents in Honghu were higher than Huangpi＇s.The C,N,K accumulation of Fengcheng were highest in Honghu,and the P accumulation of Yijiang were highest in Honghu,all the nutrients accumulations of Yijiang were highest in Huangpi.In conclusion,Fengcheng was the best variety in the single cropping rice area,Yijiang was the best variety in the double cropping rice area.