酒糟炭基肥对红缨子高粱生长、产量及土壤养分的影响研究

Effects of distiller's grain biochar-based fertilizer on Hongyingzi sorghum growth,yield and soil nutrient

为探索炭基肥中酒糟炭的最佳施加比例,通过盆栽试验研究含不同配比酒糟炭的酒糟炭基肥对红缨子高粱生长、产量及土壤养分的影响。结果表明,酒糟炭对红缨子高粱的生长有一定的促进作用,配施含30%酒糟炭的酒糟炭基肥显著增加植株株高和生物量(P<0.05);可提高红缨子高粱产量(平均每株产量13.6 g),比空白组、单施酒糟炭、单施有机肥分别提高了109%、96.5%、45.1%;配施含20%酒糟炭的酒糟炭基肥显著增加株径(P<0.05)。酒糟炭可有效降低土壤中铵态氮、有效磷和速效钾的淋失,在配施酒糟炭基肥的红缨子高粱收获后,含30%酒糟炭的炭基肥土壤中铵态氮、有效磷和速效钾含量均最低。

In order to explore the optimal biochar-based fertilizer ratio of distiller's grain,the effects of different ratios of distiller's grain biochar-based fertilizer on Hongyingzi sorghum growth,yield and soil nutrient were studied by pot experiments.The results showed that the distiller's grain biochar had a certain promoting effect on the growth of Hongyingzi sorghum,and the biochar-based fertilizer with 30%distiller's grain had the most significant increasing effect on plant height and biomass(P<0.05).The fertilizer could increase the yield of Hongyingzi sorghum(the average yield per plant 13.6 g),which was 109%,96.5%and 45.1%higher than that of the blank group,single fertilization of distiller's grain biochar and single fertilization of organic fertilizer,respectively.The biochar-based fertilizer with 20%distiller's grain had the most significant increasing effect on plant diameter(P<0.05).Distiller's grain biochar could effectively reduce the leaching of ammonium nitrogen,available phosphorus and rapid available potassium in soil,after the harvest of the Hongyingzi sorghum with distiller's grains biochar-based fertilizer,the contents of ammonium nitrogen,available phosphorus and rapid available potassium in the soil by biochar-based fertilizer with 30%distiller's grain were the lowest.