| 播期对油菜绿肥生物量及养分积累的影响 |
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| 引用本文： | 胡敏,李小坤,王振,游秋香,鲁剑巍.播期对油菜绿肥生物量及养分积累的影响[J].湖北农业科学,2017,56(4). |
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| 作者姓名： | 胡敏 李小坤 王振 游秋香 鲁剑巍 |
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| 作者单位： | 1. 华中农业大学资源与环境学院/农业部长江中下游耕地保育重点实验室,武汉,430070;2. 武穴市土壤肥料工作站,湖北武穴,435400 |
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| 基金项目： | 国家油菜产业技术体系建设专项，公益性行业(农业)科研专项 |
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| 摘 要： | 通过大田试验,设置了从2016年1月18日至3月9日共8个播种时期,研究不同播期对油菜(Brassica campestris L.)绿肥生物量、养分含量及积累量的影响,为确定晚播油菜绿肥适宜播种时期提供理论依据。结果表明,在1月18日至2月16日期间播种,油菜绿肥的鲜、干重没有显著差异,鲜重为18~20 t/hm~2,干重为2.6~3.3 t/hm~2,2月中旬后,随着播期的推迟,油菜生物量显著降低。地上部碳含量随播期推迟呈下降趋势,氮、磷、钾含量以2月上、中旬播种的最高,表明生育期70~80 d的油菜绿肥养分含量较高。在1月18日至2月9日,油菜地上部碳、磷积累量分别达到1 295~1 472、7.35~8.10 kg/hm~2,2月中旬后随播期推迟逐渐降低;氮、钾积累量呈先升高后降低趋势,在2月16日、2月9日积累量达到最大,分别为氮74.55 kg/hm~2和钾72.75 kg/hm~2。播期显著影响油菜生物量及养分积累量,试验条件下为保证油菜鲜草产量,在不影响前茬作物的前提下应适当早播;但从绿肥翻压养分积累来说,播期并不是越早越好,而是在2月上中旬播种较好。
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| 关 键 词： | 油菜(BrassicacampestrisL.) 绿肥 播种时期 生物量 养分积累量 |
Effects of Sowing Date on Biomass and Nutrient Accumulation of Oilseed Rape as Green Manure |
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| HU Min,LI Xiao-kun,WANG Zhen,YOU Qiu-xiang,LU Jian-wei.Effects of Sowing Date on Biomass and Nutrient Accumulation of Oilseed Rape as Green Manure[J].Hubei Agricultural Sciences,2017,56(4). |
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| Authors: | HU Min LI Xiao-kun WANG Zhen YOU Qiu-xiang LU Jian-wei |
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| Abstract: | Through field trial, eight sowing period were set up from 18th January to 9th March to study the influence of dif-ferent sowing date on oilseed rape(Brassica campestris L.) biomass,nutrient content and accumulation,in order to provide evi-dence for the appropriate sowing date on late sowing oilseed rape. The results showed that there were no significant difference in fresh and dry weight between 18th January and 16th February, fresh weight range within 18~20 t/hm2,dry weight range within 2.6~3.3 t/hm2. After the middle ten days of February, oilseed rape biomass decreased prominently as the sowing date postponed. C contents of the shoot decreased as the sowing date postponed, but N,P,K contents reached the highest when sowing at the early to mid-February,which showed that the nutrient content of oilseed rape growth period of 70~80 d was higher as green manure. The accumulation of C,P were 1295~1472 kg/hm2 and 7.35~8.10 kg/hm2 between 18th January and 9th February,respectively. After the middle ten days of February,C,P accumulation decreased prominently as the sowing date postponed,while the accumulation of N,K increased and then decreased,the accumulation of N,K achieved the maximum at 16th February and 9th February,respectively, which were 74.55 kg N/hm2 and 72.75 kg K/hm2. Sowing date had great effect on oilseed rape biomass and nutrient accumulation, it should be sowing early in order to ensure the rape fresh weight under there was no effect of preceding crop,but from the nutrient accumulation, sowing time was not the sooner the better, where-as, early to mid-February was the best sowing date under this condition of experiment. |
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| Keywords: | oilseed rape(Brassica campestris L ) green manure sowing date biomass nutrient accumulation |
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