生物质炭施用量对大豆生长及产量的影响
- 摘要:
- 为明确生物炭施用量对大豆生长发育及产量的影响,以大豆黑河43为材料,采用田间小区试验,在常规施肥中混施生物质炭27 kg·hm-2(B1)、54 kg·hm-2(B2)、81 kg·hm-2(B3)及108 kg·hm-2(B4) 4个水平,对大豆地上、地下部生长量、干物质积累量及产量指标进行测定。结果表明:施入生物质炭对大豆各生育时期株高、茎粗、根长、根系体积、鲜重及干物质积累量均有一定的影响作用,于对照相比增幅分别为-27.58%~13.13%、6.52%~29.62%、-9.65%~0.78%、17.78%~68.41%、-26.84%~59.79%(地上鲜重)、1.43%~62.88%(地下鲜重)、9.09%~51.49%(地上干重)、-14.07%~62.26%(地下干重)。鼓粒期和成熟期各生物炭处理大豆株高显著提高。各生物质炭处理大豆茎粗均增加。B3处理大豆地上鲜重、干重、地下鲜重、干重以及根长增幅最大。生物质炭通过使大豆单株荚数、单株有效荚数、单株粒重及百粒重提高来使单株产量提高,继而使总产量提高,产量增幅为1.57%~7.74%。总体来看常规施肥混施生物质炭81 kg·hm-2(B3处理)对大豆生长及产量促进效果最佳。
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备注/Memo
黑龙江省应用技术研究与开发计划专项(GA19B104);黑龙江八一农垦大学大学生创新创业项目(20210223110)。