ZHANG Ming-cong,SUN Wen-xiang,LUO Xiang-yu,et al.Effects of StarterN plus Topdressing N on K Accumulation and Distribution in Soybean Plants[J].Soybean Science,2013,32(05):664-669.[doi:10.11861/j.issn.1000-9841.2013.05.0664]
启动氮加追氮对大豆钾素积累分配规律的影响
- Title:
- Effects of StarterN plus Topdressing N on K Accumulation and Distribution in Soybean Plants
- 文献标志码:
- A
- 摘要:
- ?采用框栽试验方法,在施用等量肥料(N 50 kg·hm-2、P2O5 40 kg·hm-2、K2O 50 kg·hm-2)的条件下,设置氮肥作基肥一次性施用(N50),R3/R4期一次性追氮(N0+50R3/R4),启动氮15 kg·hm-2加R3/R4期追氮35 kg·hm-2(N15+35R3/R4)共5个处理,研究启动氮加追氮对大豆各器官含钾量和钾素积累分配规律的影响。结果表明:在R6期,与N50处理相比,N15+35R3和N15+35R4处理叶片、叶柄、茎秆和荚果的含钾量分别增加21.3%和33.6%(P<0.01)、18.0%和24.0%(P<0.01)、8.24%和17.5%(P<0.05)、4.60%和6.30%(P<0.05),钾素积累量分别增加36.0%和42.3%(P<0.01)、16.2%和17.9%(P<0.01)、10.57%和25.6%(P<0.05)、14.1%和23.6%(P<0.01)。N15+35R4处理产量最高,与N50处理相比增加30.5%(P<0.01),但与N15+35R3处理差异不显著。R4~R6期钾积累量与产量呈极显著正相关(P<0.01)。结果表明,启动氮加追氮处理可以显著增加大豆鼓粒期后各器官的含钾量与钾素积累量,为大豆高产奠定基础。
- Abstract:
-
?A pot experiment was conducted to assess the effects of starterN plus topdressing N on K accumulation and distribution in soybean plants.Five treatments under the same fertilizer application rates of N 50 kg·ha-1、P2O5 40 kg·ha-1、K2O 50 kg·ha-1 and different N application time were set:all N as basal fertilizer(N50),all N as topdressing at R3/R4 stage(N0+50R3/R4),N 15 kg·ha-1 as basal fertilizer and 35 kg·ha-1as topdressing at stage R3/R4(N15+35R3/R4).
At R6 stage,compared to N50,K content and K accumulation in leaves,petioles,stems,pods increased by 21.3% and 36.0%(P<0.01),18.0% and 16.2%(P<0.01),8.24% and 10.57%(P<0.05),4.60% and 14.1%(P<0.05)for N15+35R3,respectively,and increased by 33.6% and 42.3%(P<0.01),24.0% and 17.9%(P<0.01),17.5% and 25.6%(P<0.05),6.30%and 23.6%(P<0.05)for N15+35R4,respectively.N15+35R4 achieved the highest yield and increased yield by 30.5%(P<0.01)compared to N50,however,there was no significant difference between N15+35R4 and N15+35R3.There was a significant positive correlation between K accumulation during R4R6 stages and yield(P<0.01).Results indicated that using starterN plus topdressing N could lay a foundation for higher yield of soybean by significantly increasing K content and K accumulation in soybean organs after R5 stage.
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备注/Memo
?黑龙江省优势农产品生产与加工研发平台产业优化项目(GJPT006-2);哈尔滨市科技攻关计划项目(2008AA6CN040)。