草业科学2024，Vol.41Issue(6)：1347-1358,12.DOI:10.11829/j.issn.1001-0629.2023-0151
施肥和收获期对拉萨河谷地区白草产量和饲用品质的影响
Effects of fertilization and harvest period on Pennisetum flaccidum yield and forage quality in the Lhasa River Valley
摘要
Abstract
In this study,we aimed at exploring effective planting methods for achieving high yield and forage quality for Pennisetum flaccidum in Tibet.We implemented four fertilization treatments in the Lhasa River valley:N0,N300,N600,and N900(0,300,600,and 900 kg·ha-1,respectively).We collected the samples during the heading,milk,and maturation stages to analyze how the different fertilizer application rates and harvest periods affect P.flaccidum dry hay yield,forage quality,and soil nutrients.Our results demonstrated that P.flaccidum hay yield increased with increasing application rate and was significantly higher during the heading and maturation stages compared to the milk stage(P＜0.05).The crude P.flaccidum protein content decreased gradually with the harvest period delay,while the crude ash content exhibited a decreasing trend with an increasing application rate.However,fertilization did not affect significantly the P.flaccidum acid detergent fiber,neutral detergent fiber,crude fat,and acid detergent lignin contents during the different harvest periods(P＞0.05).The total nitrogen content of the soil tended to increase first,then decrease with the increasing fertilization rate during the heading stage.The total phosphorus content of the soil decreased with the increasing fertilization rate and harvest period delay.We registered the best production performance in the case of the N900-treated P.flaccidum,followed by the N600-treated P.flaccidum,both harvested at the heading stage,although the latter displayed more economic and ecological benefits.关键词
白草/施肥梯度/收获时期/干草产量/营养品质/土壤养分/生产性能Key words
Pennisetum flaccidum/fertilization gradients/harvest period/hay yield/nutritional quality/soil nutrients/production performance引用本文复制引用
肖健宇,张光雨,王江伟,黄绍琳,王志述,付刚,沈振西,余成群..施肥和收获期对拉萨河谷地区白草产量和饲用品质的影响[J].草业科学,2024,41(6):1347-1358,12.基金项目
中国科学院战略性先导科技专项子课题(XDA26050501) （XDA26050501）
国家重点研发项目(2021YFD1000303) （2021YFD1000303）
西藏"十四五"科技重大专项(XZ202101ZD0003N) （XZ202101ZD0003N）
中国科学院青年创新促进会会员项目(2020054) （2020054）
国家自然科学基金项目(31600432) （31600432）
中国科学院地理科学与资源研究所秉维优秀青年人才项目(2018RC202) （2018RC202）
