摘要
为研究麦后不同留茬高度对复种不同绿肥品种的生长状况和养分吸收的影响,本文以箭筈豌豆和毛叶苕子为绿肥材料,通过为期3年的田间试验,研究麦后留茬0、20、40 cm复种箭筈豌豆和毛叶苕子,对绿肥生物学性状和养分吸收情况的影响。结果表明:(1)麦秆留茬复种绿肥会降低不同绿肥品种的总干重。麦秆留茬20、40 cm条件下,箭筈豌豆总干重相较于不留茬处理,分别显著降低了18.95%、18.17%;毛叶苕子总干重相较于不留茬处理,分别显著降低了27.09%、36.02%。不留茬处理下,箭筈豌豆的总干重相较于毛叶苕子高6.86%。(2)留茬复种绿肥会降低不同绿肥品种对氮、磷、钾养分的吸收量,箭筈豌豆和毛叶苕子随麦秆留茬高度的增加,对氮、磷、钾养分的吸收量呈现出下降的趋势。不留茬处理下,箭筈豌豆和毛叶苕子对氮、磷养分的吸收量无显著差异;箭筈豌豆对钾的吸收量显著高于毛叶苕子,高113.67%。综上所述,麦秆不留茬复种箭筈豌豆,产量最高,养分吸收最优,建议在青海河湟农业区麦后复种绿肥时,选择不留茬复种箭筈豌豆。
Vicia sativa and Vicia villosa are used as green manure in this paper in order to investigate the effects of different stubble heights after wheat on the growth and nutrient absorption of green manure of multiple cropping of different varieties.A three-year field experiment is conducted to study the effects of multiple cropping of Vicia sativa and Vicia villosa with stubble heights of 0,20 and40 cm after wheat on the biological characteristics of green manure and nutrient absorption.The results show that:(1)The total dry weight of green manure of different varieties will be reduced by planting green manure in wheat straw stubble.Compared with non-stubble treatment,the total dry weight of Vicia sativa decreases significantly by 18.95%and 18.17%respectively when the wheat straw stubble is 20 cm and 40 cm.The total dry weight of Vicia villosa decreases significantly by27.09%and 36.02%respectively compared with non-stubble treatment.The total dry weight of Vicia sativa is 6.86%higher than that of Vicia villosa with non-stubble treatment.(2)Multiple cropping of green manure in stubble will reduce the absorption of N,P and K by different varieties of green manure.The absorption of N,P and K by Vicia sativa and Vicia villosa shows a downward trend with the increase of wheat straw stubble height.There is no significant difference in nutrient absorption of N and P between Vicia sativa and Vicia villosa.The absorption of K by Vicia sativa is significantly higher than that of Vicia villosa with a value of 113.67%.In conclusion,the yield of Vicia sativa planted without stubble is the highest with the best nutrient absorption.It is recommended to plant Vicia sativa without stubble after wheat in Hehuang agricultural area of Qinghai province.
作者
谢帅
宋明丹
韩梅
李正鹏
XIE Shuai;SONG Mingdan;HAN Mei;LI Zhengpeng(Academy of Agriculture and Forestry Sciences,Qinghai University,Xining 810016,China)
出处
《青海大学学报》
2022年第3期27-32,共6页
Journal of Qinghai University
基金
青海省科学技术厅项目(2018-ZJ-962Q)。
关键词
留茬高度
复种
绿肥
产量
养分吸收
stubble height
multiple cropping
green manure
yield
nutrient absorption
