摘要
为给旱地小麦合理使用氮磷肥提供理论依据，于山西农业大学闻喜试验基地采用大田试验研究氮磷肥对旱地小麦土壤水分和根系特性的影响。结果表明：增加施氮量，可提高氮磷比为1：0．5返青至抽穗期土壤蓄水量和各生育期根系活力、根系总长、总体积、总面积和总投影面积，而降低了氮磷比为1：1各生育期土壤蓄水量、根系活力、根系总长、总体积、总面积和总投影面积。增加施磷量，可提高返青至抽穗期土壤蓄水量，而降低了开花期、成熟期土壤蓄水量，可增加各生育时期根系活力、根系总长、总体积、总面积和总投影面积，可增加0～80cm各土层的根系长度、体积、根系面积和投影面积，且除60～80cm土层根系体积，均达显著水平。总之，施氮量为150kg／hm2，且氮磷比为l：1在旱地小麦水肥协作方面效果最佳。
This study researched the impact of nitrogen and phosphorus fertilizer on the dryland soil moisture and root characteristics using a field experiment in the test base of Shanxi Agricultural University in Wenxi. The results showed that, increasing nitrogen rate could improve the soil moisture from turning green stage to heading stage and root activity, total root length, total root volume, total root area and total projected area of different stages when the ratio of N and P was 1：0.5 and decreased the soil moisture, root activity, total root length, total root volume, total root area and total projected of different stages when the ratio of N and P was 1： 1. The result also showed that increasing phosphorus rate could improve the soil moisture from turning green stage to heading stage, hut decreased it from anthesis to mature stage, and increased the root activity, total root length, total root volume, total root area and total projected area of different stages, and increased the root
出处
《中国农学通报》
CSCD
2014年第6期82-86,共5页
Chinese Agricultural Science Bulletin
基金
现代农业产业技术体系建设专项经费"小麦隐性灾害防控与抗逆稳产综合技术研究"(CARS-03-01-24)
国家自然科学基金"旱地小麦土壤氮素移动和深层根系几何空间构型的研究"(31101112)
关键词
旱地小麦
氮磷肥
土壤水分
根系特性
dryland wheat
nitrogen and phosphorus fertilizer
soil moisture
root characteristics
