不同剂型促生菌肥与化肥配施对紫花苜蓿生产性能及营养品质的影响

Effects of three forms of growth-promoting bacterialfertilizer and chemical fertilizer reduction onthe growth and quality of alfalfa

摘要:

利用前期从植物分离的5株PGPR菌株,制作成固体(GF)、液体(YF)和包衣(BF)3种菌肥剂型,设置11个处理(GF、YF、BF、GF+7/10H、YF+7/10H、BF+7/10H、GF+1/2H、YF+1/2H、BF+1/2H、CK、H)。研究菌肥与化肥配施对紫花苜蓿生产性能和营养品质的影响。结果表明:与不施肥处理(CK)相比,固体菌肥+70%化肥处理(GF+7/10H)显著提高了紫花苜蓿的生产性能,株高达到47.95 cm,提高紫花苜蓿干草产量47.78%,是全量化肥处理的1.11倍,使紫花苜蓿营养品质显著提升,相对饲用价值为125.87,显著高于其他处理。微生物菌肥替代30%化肥与全量化肥相比对紫花苜蓿生产性能及营养品质无显著差异,即使用固体微生物菌肥可替代30%化肥,并能提高紫花苜蓿产量,改善其营养品质。

Abstract:

By using 5 growth-promoting strains previously isolated from plant rhizosphere,a rhizosphere fertilizer formula for alfalfa was developed.And then,the bacterial fertilizer was prepared with 3 forms (solid,GF;liquid,YF;seed coating,BF).A field randomized block experiment was designed with 11 treatments (GF,YF,BF,GF+7/10H,YF+710H,BF+7/10H,GF+1/2H,YF+1/2H,BF+1/2H,CK and H),including 3 forms of bacterial fertilizer and reduced chemical fertilizer (7/10H,1/2H,H),to determine the effects on the growth and quality of alfalfa.Results showed that compared with the control (CK,no fertilizer),GF+7/10H treatment significantly improved the performance of alfalfa production.The plant height was 47.95 cm;The alfalfa hay yield was increased by 47.78%,which was 1.11 times of the full amount of chemical fertilizer treatment;The alfalfa nutritional quality was significantly improved;The relative forage value was 125.87,significantly higher than other treatments.Compared with full amount of chemical fertilizer treatment,the bacterial fertilizer could replace 30% of chemical fertilizer without significant difference in alfalfa production performance and nutritional quality.