Influences of harvester and weather conditions on field loss and milling quality of rough rice

作     者：Ragab Khir Griffiths Atungulu Ding Chao Zhongli Pan 

作者机构：Department of Biological and Agricultural EngineeringUniversity of CaliforniaDavisCA 95616USA Department of Agricultural EngineeringFaculty of AgricultureSuez Canal UniversityIsmailiaEgypt Department of Food ScienceUniversity of ArkansasFayettevilleAR 72701USA College of Food Science and EngineeringNanjing University of Finance and EconomiesNanjingJiangsu 210023China Healthy Processed Foods Research UnitWestern Regional Research CenterAgricultural Research ServiceU.S.Department of AgricultureAlbanyCA 94710USA 

出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)

年 卷 期：2017年第10卷第4期

页      面：216-223页

核心收录：

学科分类：0710[理学-生物学] 0810[工学-信息与通信工程] 09[农学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0901[农学-作物学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：T&P Farms in California USDA-ARS-WRRC California Rice Research Board, RRB 

主　　题：rice harvesters field loss weather conditions milling quality harvester header 

摘      要：A better understanding of factors affecting field losses and milling quality during harvest is needed to improve the economic value of rice.The main objective of this study was to evaluate the impact of harvester header,harvester type,and weather conditions on field loss and milling quality of rough rice.Four popular harvesters equipped with different headers:John Deere 9870 with header D60-S,John Deere 9860 with header D972-S,Hardy,and John Deere 9770 with stripper header were evaluated in this study.The header and total field losses of rice were evaluated for each harvester under regular,rainy and windy weather conditions.Tests were conducted in a rice field cultivated with medium grain rice,variety M206,at Grimes,CA.Total rice yield(TRY),head rice yield(HRY)and whiteness index(WI)were examined to evaluate the effect of weather conditions on milling quality.The obtained results revealed that the rice field loss was affected by harvester header and type,and weather conditions.Among the conventional headers,D60-S significantly reduced the rice loss compared to the D972-S and the Hardy.Harvesting with John Deere 9860 resulted in significant header and field loss compared to other tested harvesters.The average loss increased from 236.2 kg/hm^(2)and 445.2 kg/hm^(2)under regular condition to 711.1 kg/hm^(2)and 907.9 kg/hm^(2)under windy condition for John Deere 9870 and John Deere 9860,respectively.The corresponding loss percentages increased from 2.6%and 4.9%to 7.9%and 10.1%.HRY was significantly affected by weather condition at harvest time.However,the weather condition had no significant effect on TRY and WI.To minimize the rice field loss and obtain good milling quality,commercial rice harvesting during regular weather conditions is important.A proper combination of harvester type and header could be vital for reducing the rice loss.