论文部分内容阅读
采用框栽试验方法,在施用等量肥料(N 50 kg·hm-2、P2O540 kg·hm-2、K2O50 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。
The nitrogen fertilizer was applied as a single fertilizer (N50) and R3 (N50) under the conditions of N 50 kg · hm-2, P2O540 kg · hm-2 and K2O50 kg · hm- / N4 + 35R3 / R4), a total of 5 treatments including nitrogen (N0 + 50R3 / R4), nitrogen 15 kg · hm-2 and nitrogen / nitrogen Effect of Nitrogen and Nitrogen on Topdressing Potassium Accumulation and Distribution in Soybean. The results showed that the potassium content of leaves, petioles, stalks and pods increased by 21.3% and 33.6% (P <0.01), 18.0% and 24.0% respectively in N5 + 35R3 and N15 + (P <0.01), 8.24% and 17.5% (P <0.05), 4.60% and 6.30% (P <0.05), K accumulation increased by 36.0% and 42.3% (P <0.01) % (P <0.01), 10.57% and 25.6% (P <0.05), 14.1% and 23.6% respectively (P <0.01). The yield of N15 + 35R4 was the highest, increased by 30.5% (P <0.01) compared with N50, but not significantly different from that of N15 + 35R3. There was a significant positive correlation between potassium accumulation and yield in stages R4 ~ R6 (P <0.01). The results showed that nitrogen and topdressing nitrogen treatment could significantly increase the potassium content and potassium accumulation of various organs after the drumming period, which laid the foundation for the high yield of soybean.