中国农业大学学报2024，Vol.29Issue(7)：181-192,12.DOI:10.11841/j.issn.1007-4333.2024.07.17
河北低平原适水粮饲模式构建及综合效益评价
Different water saving grain-forage rotations and comprehensive benefit assessment in the low plains of Hebei Province
摘要
Abstract
In order to promote the process of"grain to feed"and develop water-saving agriculture,a water-appropriate planting system should be constructed.This study focused on forage crops and food crops in Cangzhou,Hebei Province,where water is scarce.This study employed the SIMETAW model to quantify the water requirements(ETc)and irrigation demands(ETaw)of main forage crops(forage oats,silage maize,millet and summer sorghum)and staple grain crops(winter wheat and summer maize)from 1961 to 2020,analyzed the interannual variation trend of ETc of different tested crops and revealed the effect of meteorological factors on crop ETc during the past 60 years.The ROTAT model was further used to design five newly diversified forage-based crop rotations and assessed the comprehensive benefit index(CBI)based on Entropy-TOPSIS when considering equivalent yield,biomass,economic benefit,protein yield,water requirements and precipitation coupling degree of different crop rotations.The results showed that:1)The annual average ETc of six crops sorted from high to low is winter wheat(463.5 mm)＞summer maize(366.2 mm)＞summer sorghum(354.6 mm)＞forage oats(351.7 mm)＞silage maize(341.8 mm)＞millet(322.4 mm).2)Winter wheat had the highest annual average ETaw,followed by forage oats,millet,summer maize,summer sorghum while silage maize had the lowest ETaw.3)The annual ETc of six crops showed the decline trend from 1960 to 2020.The correlation analysis showed that solar radiation,sunshine and weed speed had the significant positive effect on ETc.4)Compared to the conventional wheat-maize rotation,the forage oats-based rotations decreased ETc during the growth season by 14.9％to18.8％and lowered the ETaw by 15.1％to19.2％.5)The CBI of forage oats-based rotations(0.54 to 0.73)were obviously higher than winter wheat-based rotations(0.32 to 0.37)based on Entropy-TOPSIS.Therefore,it is important to develop the forage crop-based rotations while considering food production for the sustainable water resources management and capacity in Cangzhou area.关键词
饲草作物/需水量/灌溉需水量/节水粮饲模式/节水种植结构Key words
forage crop/water requirement/irrigation demand/forage-based rotations/water-saving planting structure分类
农业科技引用本文复制引用
杨晓琳,王语萌,石恒煜,李庆祥,王显国,杜太生..河北低平原适水粮饲模式构建及综合效益评价[J].中国农业大学学报,2024,29(7):181-192,12.基金项目
国家自然科学基金项目(32071975,52239002) （32071975,52239002）
国家重点研发计划(2022YFD1900401,2022YFD1900801) （2022YFD1900401,2022YFD1900801）
