In this study,seed yield,quality and N-fertilizer use efficiency in rape(Brassica napus L.) were researched in normal oil content cultivar(Yangyou 6) and two high oil content cultivars(Zhongshuang 11 and Zheyou 50). R...In this study,seed yield,quality and N-fertilizer use efficiency in rape(Brassica napus L.) were researched in normal oil content cultivar(Yangyou 6) and two high oil content cultivars(Zhongshuang 11 and Zheyou 50). Results showed that the average oil content of all treatments in Yangyou 6,Zhongshuang 11 and Zheyou 50 was 42. 87%,47. 37% and 48. 28%,respectively. The average protein content of all treatments in Yangyou 6,Zhongshuang 11 and Zheyou 50 was 24. 15%,22. 71% and 21. 84%,respectively. The increased ratio of total nitrogen accumulation amount in Yangyou 6 was higher than that in Zhongshuang 11 and Zheyou 50. Among three cultivars,the total protein accumulation amount in Yangyou 6 was highest,and the total oil accumulation amount was highest in Zheyou 50. With increasing nitrogen fertilization,the value of different parameters of N-fertilizer use efficiency decreased. The average N use efficiency in Yangyou 6 was 68. 70%,which was higher than that in Zhongshuang 11 and Zheyou 50(65. 06% and 60. 30%,respectively). The average N-fertilizer agronomic use efficiency in Yangyou 6 was also highest among three cultivars,which was 8. 97 kg seed / kg N. On the contrary,the average N-fertilizer physiological use efficiency in Zhongshuang 11 and Zheyou 50 was 13. 03 kg seed / kg N and 13. 84 kg seed / kg N,respectively,which was higher than that in Yangyou 6(12. 91 kg seed / kg N). Differences in partial factor productivity of N-fertilizer were slight among three cultivars.展开更多
依托长期种植紫云英定位试验,以不施肥(CK)为对照,研究化肥(100%F)、紫云英配施100%、80%、60%和40%化肥(G+100%F、G+80%F、G+60%F、G+40%F)以及紫云英(G)对土壤活性有机碳氮、水稻产量、氮肥利用率及其他土壤养分的影响。结果表明,与...依托长期种植紫云英定位试验,以不施肥(CK)为对照,研究化肥(100%F)、紫云英配施100%、80%、60%和40%化肥(G+100%F、G+80%F、G+60%F、G+40%F)以及紫云英(G)对土壤活性有机碳氮、水稻产量、氮肥利用率及其他土壤养分的影响。结果表明,与对照不施肥相比,单施化肥对土壤水溶性有机碳(WSOC)的影响很小,土壤水溶性有机氮(WSON)和微生物生物量碳氮(SMBC、SMBN)含量分别增加了20.61%、10.49%和2.20%;单施紫云英处理土壤WSOC、WSON、SMBC和SMBN含量分别增加了25.52%、36.30%、19.16%和10.37%;紫云英配施化肥增加了土壤WSOC、WSON、SMBC和SMBN的含量,增幅分别为12.99%~22.80%、26.66%~56.61%、19.01%~29.56%和16.08%~32.90%。施肥提高了土壤活性有机碳氮占土壤有机碳(SOC)、全氮(TN)的比例,紫云英配施化肥和单施紫云英效果优于单施化肥。土壤活性有机碳氮与水稻产量、SOC、TN和铵态氮(NH_4^+-N)呈显著或极显著正相关。施肥增加水稻产量,G+80%F最高(10026kg hm^(-2))。与100%F相比,化肥减施20%~40%水稻不减产,同时氮肥农学效率和氮肥偏生产力提高,增幅分别为11.64%~149.65%和2.66%~149.92%,土壤SOC、TN和NH_4^+-N含量增加,土壤有效磷和速效钾降低。综合考虑水稻产量、氮肥利用率和土壤肥力,紫云英翻压22500 kg hm^(-2)、磷钾肥常规用量、氮肥减施20%时最优。展开更多
基金Supported by National Science and Technology Support Program(2014-BAD11B03)Yangzhou Agricultural Science and Technology Research Project(YZ2014172)Yangzhou Modern Agricultural Project(YZ2015026)
文摘In this study,seed yield,quality and N-fertilizer use efficiency in rape(Brassica napus L.) were researched in normal oil content cultivar(Yangyou 6) and two high oil content cultivars(Zhongshuang 11 and Zheyou 50). Results showed that the average oil content of all treatments in Yangyou 6,Zhongshuang 11 and Zheyou 50 was 42. 87%,47. 37% and 48. 28%,respectively. The average protein content of all treatments in Yangyou 6,Zhongshuang 11 and Zheyou 50 was 24. 15%,22. 71% and 21. 84%,respectively. The increased ratio of total nitrogen accumulation amount in Yangyou 6 was higher than that in Zhongshuang 11 and Zheyou 50. Among three cultivars,the total protein accumulation amount in Yangyou 6 was highest,and the total oil accumulation amount was highest in Zheyou 50. With increasing nitrogen fertilization,the value of different parameters of N-fertilizer use efficiency decreased. The average N use efficiency in Yangyou 6 was 68. 70%,which was higher than that in Zhongshuang 11 and Zheyou 50(65. 06% and 60. 30%,respectively). The average N-fertilizer agronomic use efficiency in Yangyou 6 was also highest among three cultivars,which was 8. 97 kg seed / kg N. On the contrary,the average N-fertilizer physiological use efficiency in Zhongshuang 11 and Zheyou 50 was 13. 03 kg seed / kg N and 13. 84 kg seed / kg N,respectively,which was higher than that in Yangyou 6(12. 91 kg seed / kg N). Differences in partial factor productivity of N-fertilizer were slight among three cultivars.
文摘依托长期种植紫云英定位试验,以不施肥(CK)为对照,研究化肥(100%F)、紫云英配施100%、80%、60%和40%化肥(G+100%F、G+80%F、G+60%F、G+40%F)以及紫云英(G)对土壤活性有机碳氮、水稻产量、氮肥利用率及其他土壤养分的影响。结果表明,与对照不施肥相比,单施化肥对土壤水溶性有机碳(WSOC)的影响很小,土壤水溶性有机氮(WSON)和微生物生物量碳氮(SMBC、SMBN)含量分别增加了20.61%、10.49%和2.20%;单施紫云英处理土壤WSOC、WSON、SMBC和SMBN含量分别增加了25.52%、36.30%、19.16%和10.37%;紫云英配施化肥增加了土壤WSOC、WSON、SMBC和SMBN的含量,增幅分别为12.99%~22.80%、26.66%~56.61%、19.01%~29.56%和16.08%~32.90%。施肥提高了土壤活性有机碳氮占土壤有机碳(SOC)、全氮(TN)的比例,紫云英配施化肥和单施紫云英效果优于单施化肥。土壤活性有机碳氮与水稻产量、SOC、TN和铵态氮(NH_4^+-N)呈显著或极显著正相关。施肥增加水稻产量,G+80%F最高(10026kg hm^(-2))。与100%F相比,化肥减施20%~40%水稻不减产,同时氮肥农学效率和氮肥偏生产力提高,增幅分别为11.64%~149.65%和2.66%~149.92%,土壤SOC、TN和NH_4^+-N含量增加,土壤有效磷和速效钾降低。综合考虑水稻产量、氮肥利用率和土壤肥力,紫云英翻压22500 kg hm^(-2)、磷钾肥常规用量、氮肥减施20%时最优。
