石灰配施微生物菌剂对大豆套种西瓜产量和红壤肥力的影响

Effects of lime and microbial inoculants on yield of soybean interplanting watermelon and fertility of red soil

以提高红壤肥力,增加大豆、西瓜产量为目标,研究了石灰配施微生物菌剂对大豆套作西瓜产量及红壤肥力的影响。试验共设置了CK(常规施肥对照)、L(在常规施肥基础上配施石灰)、M(在常规施肥基础上配施微生物菌剂)、L+M(在常规施肥基础上配施石灰和微生物菌剂)4个处理。结果表明,与CK相比,L、M、L+M处理的鲜食大豆产量分别提高了18.40%、22.45%和32.96%,西瓜产量分别增加了15.20%、27.20%和41.37%;与CK相比,L+M处理下土壤速效氮、速效磷、速效钾含量分别提高了43.49%、48.21%和23.91%,同时土壤pH提高了0.69个单位;综合肥力质量指数与鲜食大豆和西瓜产量均呈显著的正相关关系(P<0.05)。由此可知,在红壤旱地上,配施石灰和微生物菌剂可以显著提升大豆套种西瓜模式的作物产量,并显著改善土壤氮、磷、钾速效养分的供应状况,从而增加土壤综合肥力质量指数。

In order to improve the fertility of red soil and increase the yield of soybean and watermelon,the effects of lime combined with microbial agents on the yield of soybean intercropping watermelon and the fertility of red soil were studied.4 treatments including CK(conventional fertilization control),L(lime application on the basis of conventional fertilization),M(microbial agent application on the basis of conventional fertilization),and L+M(lime and microbial agent application on the basis of conventional fertilization)were set in the experiment.The results showed that compared with the control,the yield of fresh soybean under L,M and L+M treatments was increased by 18.40%,22.45% and 32.96%,respectively,and the yield of watermelon was increased by 15.20%,27.20% and 41.37%,respectively.Compared with the control,soil available N,P and K under L+M treatment increased by 43.49%,48.21% and 23.91% respectively,and soil pH increased by 0.69 units.The comprehensive fertility quality index was significantly positively correlated with the yield of fresh soybean and watermelon(P<0.05).On red soil upland,the combination of lime and microbial agents could significantly enhance the crop yield of soybean interplanting watermelon pattern,improve the soil available nitrogen,phosphorus and potassium nutrient supply,and increase the comprehensive fertility index.