摘要
为探究不同影响因素条件下苜蓿产量和品质对调亏灌溉的响应,为苜蓿种植提供理论依据,通过整合已发表的相关田间试验数据,采用荟萃分析(meta-analysis),定量研究以充分灌溉为对照的调亏灌溉下苜蓿产量、品质的综合效应及其主要影响因素。结果表明:与充分灌溉相比,调亏灌溉的苜蓿产量降低19.3%(95%置信区间-22.5%~16.0%),但品质极显著(P<0.01)提升,粗蛋白含量平均提高14.5%(95%置信区间12.4%~16.6%),酸性洗涤纤维和中性洗涤纤维含量分别平均降低10.8%(95%置信区间-12.3%~-9.2%)和13.2%(95%置信区间-14.4%~-11.9%)。综合产量和品质效应,在年平均气温0~5℃和>10~15℃、年降水量<200 mm和>400~800 mm的地区,种植密度>20~25 kg·hm^(-2)时,调亏灌溉有利于苜蓿稳产,且品质较高。在不同的农业生产区,以滴灌配合分生育期调亏、调亏度75%~85%(以田间持水量为基准)能够维持苜蓿较优的生产效应。
To explore the response of alfalfa yield and quality to regulated deficit irrigation under different influencing factors and provide theoretical basis for alfalfa planting,the comprehensive effect was quantitatively studied in the present study,as well as the main influencing factors under regulated deficit irrigation with full irrigation as the control by integrating published relevant field test data and using meta-analysis method.The results showed that,compared with the full irrigation,the yield of alfalfa under regulated deficit irrigation decreased by 19.3%(95%confidence interval:-22.5%-16.0%),but the quality was significantly(P<0.01)improved.The crude protein content was increased by 14.5%(95%confidence interval:12.4%-16.6%),while the acid detergent fiber content and neutral detergent fiber content were decreased by 10.8%(95%confidence interval:-12.3%--9.2%)and 13.2%(95%confidence interval:-14.4%--11.9%),respectively.Given the yield and quality effects,annual average temperature of 0-5℃and>10-15℃,annual precipitation of<200 mm and>400-800 mm,the regulated deficit irrigation would be conducive for the alfalfa yield and quality with planting density of>20-25 kg·hm^(-2).In different agricultural production areas,the regulated deficit irrigation with drip irrigation,regulated deficit at different growth period,and a regulated deficit degree of 75%-85%(based on the field capacity)would maintain sound production effect of alfalfa.
作者
许立婷
齐广平
康燕霞
银敏华
马彦麟
贾琼
汪精海
姜渊博
XU Liting;QI Guangping;KANG Yanxia;YIN Minhua;MA Yanlin;JIA Qiong;WANG Jinghai;JIANG Yuanbo(College of Water Conservancy and Hydropower Engineering,Gansu Agricultural University,Lanzhou 730070,China)
出处
《浙江农业学报》
CSCD
北大核心
2024年第6期1256-1269,共14页
Acta Agriculturae Zhejiangensis
基金
国家自然科学基金(51969003,52069001)
甘肃省高等学校产业支撑计划(2021CYZC-20)
甘肃省高等学校青年博士基金(2022QB-088)
甘肃省高等学校创新基金(2022B-101,2021CXZX-405)
甘肃农业大学水利水电工程学院科研团队建设专项(Gaucwky-01)。
关键词
苜蓿
调亏灌溉
产量
品质
荟萃分析
alfalfa
deficit irrigation
yield
quality
meta-analysis
