中国油料作物学报2025，Vol.47Issue(2)：435-442,8.DOI:10.19802/j.issn.1007-9084.2024045
油菜品种中油杂501高产油的氮素需求规律
Nitrogen demand characteristics in Brassica napus cultivar Zhongyouza 501 with high oil production
摘要
Abstract
Higher oil product is the target of Brassica napus production.To better understand nitrogen(N)de-mand characteristics of oilseed rape cultivar Zhongyouza 501 for high oil product target,field experiments with dif-ferent N application rates were conducted in 4 counties at Hubei Province during the 2022-2023 growing season.The dynamic changes in shoot biomass and N accumulation rate of Zhongyouza 501 were measured to analyze the re-sponses of seed yield and oil product to N supply rates,and clarify the dynamic dry matter and N accumulation rate under high oil product targets.Results showed that sufficient N application was a prerequisite for high seed yield by increasing pod number per plant,but seed oil content was reduced by 3.3%-12.1%under high N input.The N input amount for obtaining the maximum seed yield at each experimental site was 251-285 kg/hm2,while the input could be reduced by 15%-23%for obtaining the maximum oil product.The maximum N accumulation and biomass in shoot of oilseed rape with a target seed yield of 4500 kg/hm2 were higher than those with seed yield of 3000 kg/hm2 or below by 7.2%-47.5%and 3.7%-49.4%,respectively.The rapid growth stage of oilseed rape with a target seed yield of 4500 kg/hm2 was significantly advanced,and N nutrient in shoot began to accumulate rapidly after 36 d of sowing.The biomass and N accumulation rate on shoot with a target seed yield of 4500 kg/hm2 could reached at 5880 kg/hm2and 128.5 kg/hm2 at 100d after sowing(over-winter stage),which was higher than those with seed yield of 3000 kg/hm2 or below by 1.8-4.1 times and 0.4-4.1 times,respectively.In summary,the suitable N rate for high oil product of Zhongyouza 501 cultivar was 191-257 kg/hm2,and the overwintering biomass with 5880 kg/hm2 could promote high seed yield.In production,it is necessary to coordinate the relationship between N rates and seed oil content by properly reducing N fertilizer input rate to achieve high oil product per area.关键词
油菜/含油量/目标产量/氮素积累量/生物量Key words
oilseed rape/seed oil content/yield target/N accumulation rate/shoot biomass分类
农业科技引用本文复制引用
胡文诗,秦璐,李凯旭,尹羽丰,常海滨,余小红,黄威,顾炽明,李银水,廖星..油菜品种中油杂501高产油的氮素需求规律[J].中国油料作物学报,2025,47(2):435-442,8.基金项目
中国农业科学院科技创新工程重大科研任务(CAAS-ZDRW202105) （CAAS-ZDRW202105）
中央级科研院所基本科研业务费专项(1610172022008) （1610172022008）
中国农业科学院科技创新工程(CAAS-ASTIP-2013-OCRI) （CAAS-ASTIP-2013-OCRI）
