摘要
[目的]研究杨树-苜蓿间作对紫花苜蓿生长发育及品质的影响,为新疆林草复合模式的可持续发展提供理论和技术依据.[方法]2018～2019 年4 月上旬至9 月上旬,每隔15d对紫花苜蓿进行采样,测定紫花苜蓿的农艺性状(株高、叶面积指数、茎叶比、茎粗、生长速度)及品质(粗蛋白、粗脂肪、饲用品质),并监测单作、间作紫花苜蓿田间微气候(空气温度、空气湿度、露点温度、风速).[结果]间作苜蓿各项指标均显著低于单作,间作的干草总产量比单作低 55.27%;单作紫花苜蓿的露点温度和风速分别比间作高 70.68%、93.83%,但单作紫花苜蓿的空气湿度比间作低13.49%,空气温度无显著差异;间作紫花苜蓿的粗蛋白、粗脂肪和饲用品质分别比对应的单作高17.78%、12.33%和17.26%.[结论]杨树-紫花苜蓿间作能够改善农田微气候并显著提高紫花苜蓿的营养品质.
Abstract
[Objective]This experiment explored the influence of poplar-alfalfa intercropping on the growth,development and quality of alfalfa,so as to provide theoretical and technical basis for the sustainable development of forest and grass composite model in Xinjiang.[Methods]The experiment from 2018 to 2019,during the early April to September of every 15 days to sampling of alfalfa,determination of alfalfa agronomic traits(plant height,leaf area index,stem/leaf ratio,stem diameter,growth rate)and quality(crude protein,crude fat,forage quality),and the sole,intercropping alfalfa microclimate monitoring field(air temperature,air humidity and dew point temperature,wind speed)monitoring.[Results]The results showed that inter-cropped alfalfa was significantly lower than sole-cropped alfalfa in agronomic traits,and the total yield of in-tercropped alfalfa was 55.27%lower than that of sole-cropped alfalfa.The dew point temperature and wind speed of alfalfa monoculture were 70.68%and 93.83%higher than that of intercropping,but the air humidity of sole-cropped alfalfa was 13.49%lower than that of intercropped alfalfa,and there was no significant difference in air temperature.The crude protein,crude fat and forage quality of intercropping alfalfa were 17.78%,12.33%and 17.26%higher than that of sole-cropped alfalfa.[Conclusion]The development of intercropping between forest and grass can improve the microclimate of farmland.
基金项目
国家自然科学基金项目(31460335)
国家自然科学基金项目(31560376)
国家牧草产业技术体系石河子综合试验站(CARS-34)
中国博士后科学基金(2015M582737)
国家科技期刊平台
NSTL
万方数据