两种防霉剂添加对高寒地区燕麦干草品质的影响

Effects of two kinds of antifungal agent onquality of oat hay in alpine area

摘要:

以甘肃省张掖市山丹县军马二场种植的燕麦干草为试验材料,在燕麦干草低含水量15 %~17 %(A1)和高含水量28 %~30 %(A2)条件下,分别添加0 %(B1)、0.2 %(B2)、0.4 %(B3)的丙酸钙,以及0 %(C1)、0.05 %(C2)、0.1 %(C3)的苯甲酸钠,打捆并码放在储草棚内贮藏。测定贮藏0、30、60、90、120、150、180 d燕麦干草的含水量和营养指标。结果表明:随贮藏时间延长,燕麦干草的含水量、粗蛋白(CP)、粗脂肪(EE)、无氮浸出物(NEF)和总可消化养分含量均下降。贮藏180 d,CP含量平均下降21.99 %,EE由刚打捆时的3.17 %-3.39 %下降至180 d的1.47 %-2.45 %;A2C2的含水量最高,为15.19%, A2C3的CP含量最高,为8.13%,A1B3的EE含量最高,为2.45%。随着贮藏时间的延长,粗灰分,中洗纤维和酸洗纤维含量显著增加,A1C1的粗灰分含量最高,A2B1的NDF含量最高。添加两种防霉剂能显著降低燕麦干草的营养损失,贮藏时间越长防霉剂效果越明显。燕麦干草在含水量28%~30%条件下添加0.4 %的丙酸钙或者0.1 %的苯甲酸钠再打捆,能显著改善燕麦干草品质。

Abstract:

Oat hay produced on Junma No.2 Farm, Shandan County of Zhangye City was used as material, and was added 0%(B1), 0.2%(B2), 0.4%(B3) calcium propionate and 0%(C1),0.05%(C2), 0.1%(C3) sodium benzoate at low moisture content of 15%-17% (A1) and high moisture content of 28%- 30% (A2), respectively; Then baled and stored in shelter. The moisture content and nutritive value were tested after 0, 30, 60, 90, 120, 150 and 180 d storage. The results showed that with the prolonging storage time, crude protein (CP), ether extract (EE), nitrogen free extract (NEF) and total digestible nutrient of oat hay decreased. After 180 days of storage, the CP content decreased by 21.99% averagely, and EE decreased from 3.17%-3.39% at baling to 1.47%-2.45%. The treatment A2C2 had the highest moisture content (15.19%), A2C3 had the highest CP content (8.13%), and the highest EE (2.45%) was observed in A1B3 treatment. The crude ash, NDF and ADF increased significantly with the increasing storage time. The treatment A1C1 had the highest crude ash content while A2B1 showed the highest NDF content. The addition of antifungal agent can significantly reduce the nutritional loss of oat hay. The longer the storage time, the more effective of the antifungal agent. Add of 0.4% calcium propionate or 0.1% sodium benzoate to oat hay with 28%-30% moisture content can significantly improve the quality of oat hay.