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通过田间试验研究了生物炭不同施用量(0、10、20、40、80 t/hm~2)对玉米茎秆中的钾含量、茎秆形态特征、茎秆质量性状及产量的影响。结果表明:土壤中施加生物炭能够促进玉米茎秆各节的钾含量,并且生物炭的施入矮化了蜡熟期玉米茎基部3~5节的节间长,增大了玉米茎粗,增强了茎秆弹力和茎秆外皮穿刺力,增加了茎秆干物质积累,使茎秆粗壮、坚韧。随着生物炭施用量增加对玉米茎秆钾含量、茎秆性状及产量的影响均表现出先增大后降低的趋势。施炭量40 t/hm~2为最优施用量,产量达13 261 kg/hm~2,较对照提高了25.99%。当施炭量为80 t/hm~2时茎秆中的钾含量、茎秆形态特征、茎秆质量性状及产量的提高幅度略有下降。
Field experiments were conducted to study the effects of different biochar application rates (0, 10, 20, 40 and 80 t / hm ~ 2) on potassium content, stem morphological traits, stem quality traits and yield of corn stalks. The results showed that the application of biochar in soil could promote the potassium content of corn stalks, and the application of biochar dwarfed the internodes of 3 to 5 stems at the base of corn in maturity stage, which increased the stem diameter, Enhance the stalk stretch and stem skin puncture force, increased dry matter accumulation of stalks, stalks sturdy, tough. With the increase of biochar application rate, the effects on the potassium content, stem traits and yield of corn stalks firstly increased and then decreased. The optimal application rate was 40 t / hm ~ 2 and the yield was 13 261 kg / hm ~ 2, which was 25.99% higher than the control. When the amount of carbon applied was 80 t / hm ~ 2, the content of potassium in the stalks, the shape of the stalks, the quality traits of the stalks and the increase of the yield decreased slightly.