西北内陆干旱区水分调控对豆禾混播草地群落稳定性的影响及评价

在西北内陆干旱区干旱少雨,探寻高产节水的草地群落以实现生态环境的稳定。通过2 a(2019和2020年)田间试验,对比分析了4种水分调控梯度（充分灌溉W0,75%～85%的田间持水量（FC）;轻度亏水W1,65%～75%FC;中度亏水W2,55%～65%FC;重度亏水W3,45%～55%FC）和3种豆禾混播组合（紫花苜蓿+无芒雀麦,A1;紫花苜蓿+无芒雀麦+长穗偃麦草,A2;紫花苜蓿+无芒雀麦+长穗偃麦草+草地早熟禾,A3）对群落稳定性的影响。结果表明：水分调控与混播组合对混播草地组分稳定性无显著影响,但显著影响混播草地功能稳定性（产量和粗蛋白含量）和种间相容性,水分调控与混播组合的交互效应对草地的组分稳定性、功能稳定性和种间相容性均无显著影响。综合评价得出,轻度水分亏缺条件下紫花苜蓿+无芒雀麦+长穗偃麦草混播处理的加权关联度最高,综合排名最优,是西北内陆干旱区适宜的豆禾混播组合与灌水管理模式,该研究可为当地人工草地高效节水可持续生产提供理论基础及技术支持。     

玉米发酵饮料生产中糖化液离心工艺优化研究

本研究以玉米籽粒为主要原料制备澄清型发酵饮料,为解决成品贮藏一段时间后,易出现分层现象,对生产糖化液离心工艺进行优化。通过实验确定出9kr/min为最适合的玉米糖化液离心转速,所获产品在室温条件下贮藏45d,其外观分布均匀,没有沉淀或分层。     

蚕桑种植技术及生产误区

<正>陇川县位于云南省德宏傣族景颇族自治州,与缅甸毗邻,总面积1 913 km²,耕地面积2.33万hm²。陇川县属南亚热带季风气候,雨量充沛、日照充足、热量丰富、四季不明显、干湿季分明。年平均气温18.9℃,降雨量1 595 mm,日照数2 316 h。农业以粮食、甘蔗、烟叶种植业等为主。近年来,陇川县大力发展绿色产业经济,致力于农业产业结构转型。在政府引导和扶持下,大力推广"支部+公司+基地+合作社+农户"五位一体发展模式,打造"千亩蚕桑连片产业示范基地",     

Irrigation scheduling based on yield and quality in Bromus inermis北大核心CSCD

A suitably calculated irrigation regime can improve the productivity of artificial grassland，improve the quality of pasture and enhance water use efficiency in drier areas. In this research we compared the effects of two irrigation regimes（regulated deficit irrigation at different growth stages，I1；regulated deficit irrigation over the whole growth period ，I2）on yield and quality of Bromus inermis in the Hexi Corridor. Irrigation scheduling was optimized by considering the results of field trials and simulations of irrigation scheduling in typical dry years to provide a theoretical basis for local production practices. The results showed that：The yield of B. inermis in I1 initially increased and then decreased with successive increases in the amount of water applied，while in I2 B. inermis yield showed an increasing trend across the range of irrigation rates tested. In both irrigation regimes，the crude protein content of B. inermis gradually decreased with increasing water supply，while the acid detergent fiber and neutral detergent fiber contents increased somewhat. Compared with I2，B. inermis yield was increased by 23.11% on average and crude protein content by 6. 09% on average in I1；therefore，the I1 irrigation regime was superior. Based on the field trial combined with the simulation of irrigation scheduling in a typical dry year，it was found that a treatment designated ［greening stage （75%-85% θFC），jointing stage （65%-85% θFC），and tasseling stage （65%-85% θFC），I1DF1］，irrigation frequency of 12 times，and a total irrigation amount of 521. 76 mm provided water-saving benefits and stable yield in B. inermis in the Hexi Corridor. © 2022 Editorial Office of Acta Prataculturae Sinica. All rights reserved.