Objective] The aim was to explain the accumulation characteristic of mineral elements in alpine grassland plants and the effect of supplementary supply on the nutrient changes of mineral elements. [Method] Potted Poa ...Objective] The aim was to explain the accumulation characteristic of mineral elements in alpine grassland plants and the effect of supplementary supply on the nutrient changes of mineral elements. [Method] Potted Poa crymophila cv. Qinghai plants were regularly applied with liquid mineral mixed fertilizers, and samples were collected for analysis and detection. [Result] After the regular spraying of liquid mineral mixed fertilizers, the mineral elements in potted P. crymophila and its soil reduced （ P 〈0.05）, but the accumulation of corresponding mineral elements of P. crymophila in the control group was increased due to the ＂Starvation Effect＂, which was one of the endogenetic forces driving the increase in the accumulation of mineral elements. [Conclusion] This study is of great significance for the study of the accumulation of mineral elements in degraded grassland plants and its dynamic mechanism, as well as testing the hypothesis of the Starvation Effect of mineral elements. In addition, it also provides scientific bases and technical support for the restoration and remediation of degraded grassland and the development of ecological livestock husbandry.展开更多
选用青海冷地早熟禾(Poa crymophila Keng cv.‘Qinghai’)和青海中华羊茅(Festuca sinensis Keng cv.‘Qinghai’)裸种子、未加保水剂丸粒种子和加有保水剂丸粒种子进行试验,研究干旱胁迫对2种牧草裸种子、未加保水剂丸粒种子和加有保...选用青海冷地早熟禾(Poa crymophila Keng cv.‘Qinghai’)和青海中华羊茅(Festuca sinensis Keng cv.‘Qinghai’)裸种子、未加保水剂丸粒种子和加有保水剂丸粒种子进行试验,研究干旱胁迫对2种牧草裸种子、未加保水剂丸粒种子和加有保水剂丸粒种子幼苗相对生长率、幼苗相对含水量、幼苗中游离脯氨酸质量分数的影响。结果表明,在干旱胁迫下,土壤质量含水量明显降低,导致种子幼苗的相对生长率、相对含水量、以及游离脯氨酸质量分数都受到很大影响。随干旱胁迫的加重,幼苗的相对生长率减小,相对含水量降低,游离脯氨酸质量分数增加。根据隶属函数值分析得出,3类试验的青海冷地早熟禾和青海中华羊茅种子幼苗抗旱性顺序均为加有保水剂丸粒种子>裸种子>未加保水剂丸粒种子。展开更多
针对三江源区"黑土滩"治理中的牧草种子萌发与生长困难这一突出问题,结合种子丸粒化技术的研究,选用青藏高原优良牧草青海冷地早熟禾(Poa crymophila Keng CV.Qinghai)种子为研究对象,开展5%、10%、15%、20%的肥料(尿素∶磷...针对三江源区"黑土滩"治理中的牧草种子萌发与生长困难这一突出问题,结合种子丸粒化技术的研究,选用青藏高原优良牧草青海冷地早熟禾(Poa crymophila Keng CV.Qinghai)种子为研究对象,开展5%、10%、15%、20%的肥料(尿素∶磷酸二氢钾=1∶1.3)添加水平对青海冷地早熟禾丸粒化种子发芽和幼苗生长的影响研究。结果表明,随着肥料含量的增加,丸粒化种子发芽天数相应推迟(p﹥0.05),丸粒化种子发芽率均低于对照组(p﹤0.01);经不同肥料水平处理的丸粒化种子种植于未退化草地土壤中,丸粒化种子的出苗率均较对照组有所降低,且15%肥料组低于对照组(p﹤0.05),其株高、根长、叶片数、苗鲜重、苗干重均略高于对照组(p﹥0.05);种植于退化草地土壤中,添加肥料组丸粒化种子的出苗率均较对照组有所降低,同时随着肥料含量的增加(除20%的肥料外),其株高、叶片数、苗鲜重、苗干重与对照组相比,均无显著差异(P﹥0.05)。结论:不同肥料(尿素∶磷酸二氢钾=1∶1.3)添加水平制作的青海冷地早熟禾丸粒化种子,均降低了丸粒化种子的发芽率和出苗率,而对促进幼苗生长的作用不明显,表明了尿素和磷酸二氢钾肥料配合在丸粒化种子幼苗生长上没有显著的协同效应。因此,今后的工作中,需进一步开展尿素或磷钾肥单独添加对青海冷地早熟禾丸粒化种子发芽率和出苗率的影响研究是十分必要的工作,同时建议尝试添加有机肥作为丸粒化种子的养分配料。展开更多
基金Supported by the General Program of Natural Science Foundation of Qinghai Province(2016-ZJ-906)
文摘Objective] The aim was to explain the accumulation characteristic of mineral elements in alpine grassland plants and the effect of supplementary supply on the nutrient changes of mineral elements. [Method] Potted Poa crymophila cv. Qinghai plants were regularly applied with liquid mineral mixed fertilizers, and samples were collected for analysis and detection. [Result] After the regular spraying of liquid mineral mixed fertilizers, the mineral elements in potted P. crymophila and its soil reduced （ P 〈0.05）, but the accumulation of corresponding mineral elements of P. crymophila in the control group was increased due to the ＂Starvation Effect＂, which was one of the endogenetic forces driving the increase in the accumulation of mineral elements. [Conclusion] This study is of great significance for the study of the accumulation of mineral elements in degraded grassland plants and its dynamic mechanism, as well as testing the hypothesis of the Starvation Effect of mineral elements. In addition, it also provides scientific bases and technical support for the restoration and remediation of degraded grassland and the development of ecological livestock husbandry.
文摘选用青海冷地早熟禾(Poa crymophila Keng cv.‘Qinghai’)和青海中华羊茅(Festuca sinensis Keng cv.‘Qinghai’)裸种子、未加保水剂丸粒种子和加有保水剂丸粒种子进行试验,研究干旱胁迫对2种牧草裸种子、未加保水剂丸粒种子和加有保水剂丸粒种子幼苗相对生长率、幼苗相对含水量、幼苗中游离脯氨酸质量分数的影响。结果表明,在干旱胁迫下,土壤质量含水量明显降低,导致种子幼苗的相对生长率、相对含水量、以及游离脯氨酸质量分数都受到很大影响。随干旱胁迫的加重,幼苗的相对生长率减小,相对含水量降低,游离脯氨酸质量分数增加。根据隶属函数值分析得出,3类试验的青海冷地早熟禾和青海中华羊茅种子幼苗抗旱性顺序均为加有保水剂丸粒种子>裸种子>未加保水剂丸粒种子。
文摘针对三江源区"黑土滩"治理中的牧草种子萌发与生长困难这一突出问题,结合种子丸粒化技术的研究,选用青藏高原优良牧草青海冷地早熟禾(Poa crymophila Keng CV.Qinghai)种子为研究对象,开展5%、10%、15%、20%的肥料(尿素∶磷酸二氢钾=1∶1.3)添加水平对青海冷地早熟禾丸粒化种子发芽和幼苗生长的影响研究。结果表明,随着肥料含量的增加,丸粒化种子发芽天数相应推迟(p﹥0.05),丸粒化种子发芽率均低于对照组(p﹤0.01);经不同肥料水平处理的丸粒化种子种植于未退化草地土壤中,丸粒化种子的出苗率均较对照组有所降低,且15%肥料组低于对照组(p﹤0.05),其株高、根长、叶片数、苗鲜重、苗干重均略高于对照组(p﹥0.05);种植于退化草地土壤中,添加肥料组丸粒化种子的出苗率均较对照组有所降低,同时随着肥料含量的增加(除20%的肥料外),其株高、叶片数、苗鲜重、苗干重与对照组相比,均无显著差异(P﹥0.05)。结论:不同肥料(尿素∶磷酸二氢钾=1∶1.3)添加水平制作的青海冷地早熟禾丸粒化种子,均降低了丸粒化种子的发芽率和出苗率,而对促进幼苗生长的作用不明显,表明了尿素和磷酸二氢钾肥料配合在丸粒化种子幼苗生长上没有显著的协同效应。因此,今后的工作中,需进一步开展尿素或磷钾肥单独添加对青海冷地早熟禾丸粒化种子发芽率和出苗率的影响研究是十分必要的工作,同时建议尝试添加有机肥作为丸粒化种子的养分配料。
