王慧丽, 钟苑宁, 杨晗, 马玉诏, 乔匀周, 张小帅, 黄欣莉, 董宝娣. 水分和温度对藜麦种子萌发出苗及籽粒产量的影响[J]. 中国生态农业学报 (中英文), 2024, 32(0): 1−9. DOI: 10.12357/cjea.20240056
引用本文: 王慧丽, 钟苑宁, 杨晗, 马玉诏, 乔匀周, 张小帅, 黄欣莉, 董宝娣. 水分和温度对藜麦种子萌发出苗及籽粒产量的影响[J]. 中国生态农业学报 (中英文), 2024, 32(0): 1−9. DOI: 10.12357/cjea.20240056
WANG H L, ZHONG Y N, YANG H, MA Y Z, QIAO Y Z, ZHANG X S, HUANG X L, DONG B D. Effects of water and temperature on seed germination and grain yield of quinoa[J]. Chinese Journal of Eco-Agriculture, 2024, 32(0): 1−9. DOI: 10.12357/cjea.20240056
Citation: WANG H L, ZHONG Y N, YANG H, MA Y Z, QIAO Y Z, ZHANG X S, HUANG X L, DONG B D. Effects of water and temperature on seed germination and grain yield of quinoa[J]. Chinese Journal of Eco-Agriculture, 2024, 32(0): 1−9. DOI: 10.12357/cjea.20240056

水分和温度对藜麦种子萌发出苗及籽粒产量的影响

Effects of water and temperature on seed germination and grain yield of quinoa

  • 摘要: 藜麦作为富含营养物质且喜冷凉的旱地作物, 温度和水分是限制其种子萌发和生长的必要条件, 明确温度和干旱胁迫下藜麦的出苗和田间生长发育情况对雨养旱作区藜麦高产高效种植有重要意义。本研究以坝上地区典型藜麦品种‘冀藜3号’为试验材料, 通过设置 ①种子萌发试验: 3个干旱胁迫处理(PEG-6000溶液渗透势分别为0、−0.3 MPa、−0.6 MPa)和4个种子萌发温度(10℃/0℃、15℃/5℃、20℃/10℃、25℃/15℃), 分析干旱和温度胁迫及其互作效应对发芽率、发芽势、根长和芽长以及超氧化物歧化酶和过氧化氢酶的影响, 阐明其对环境胁迫因素的响应机制; ②播期试验: 在河北坝上地区设置5个播期(5月1日、5月11日、5月21日、6月1日和6月11日), 探究不同播期下环境温度和土壤水分变化对出苗率及产量的影响, 明确河北坝上冷凉地区藜麦高产的适宜种植时间。种子萌发试验结果表明: 随着温度的升高, 发芽率、发芽势、根长和芽长逐渐增加, 20℃/10℃和25℃/15℃处理下种子萌发率较高。在干旱胁迫下, 种子萌发指标整体下降。当干旱胁迫较轻(PEG-6000为−0.3 MPa)时, SOD和CAT活性较高, 种子萌发受到的影响较小。田间试验结果表明: 随着播期推迟, 藜麦出苗期间温度和籽粒产量呈先下降后上升再下降的趋势, 以6月1日播期处理最高。相关性分析表明, 出苗率与环境温度呈正相关, 产量与株数呈显著正相关。6月1日播期出苗期间的平均气温为17.77℃, 出苗率为95.72%: 5月11日播期的出苗期间的平均温度为5.90℃, 出苗率为6.58%。相比于5月11日播期, 6月1日播期产量提高435.67 kg∙hm−2。以上结果表明, 藜麦种子能耐受一定程度的干旱胁迫, 但在低于15℃/5℃的温度下萌发表现较差。在坝上冷凉地区, 为确保藜麦的出苗率免受低温的负面影响, 不宜过早播种。适宜播期在5月中旬到6月上旬, 以保证藜麦生长所需的适宜温度。此结果可为优化坝上冷凉地区藜麦种植管理提供科学依据。

     

    Abstract: Quinoa is a kind of dry land crop which is rich in nutrients and likes cold. The emergence rate is one of the main factors affecting its yield. Temperature and water are the necessary conditions affecting seed germination and growth. Therefore, it is of great significance to study the emergence and field growth and development of quinoa under temperature and drought stress for high yield and high efficiency cultivation of quinoa. In this study, the typical quinoa variety 'Jili 3' in Bashang area was used as the experimental material. ①Seed germination test: three drought stress treatments (osmotic potential of PEG-6000 solution was 0, −0.3 MPa, −0.6 MPa, respectively) and four temperatures (10℃/0℃, 15℃/5℃, 20℃/10℃, 25℃/15℃). The effects of drought and temperature stress and their interaction on germination rate, germination potential, root length and shoot length, superoxide dismutase and catalase were analyzed, and the response mechanism to environmental stress factors was clarified. ②Sowing date test: five sowing dates of May 1, May 11, May 21, June 1 and June 11 were set up to explore the effects of different sowing dates on seedling emergence rate and yield, and to clarify the suitable planting time for high yield of quinoa in cold area of Bashang, Hebei. The results of seed germination test showed that the germination rate, germination potential, root length and bud length increased gradually with the increase of temperature, and the seed germination rate was higher at 20℃/10℃ and 25℃/15℃. Under drought stress, the seed germination index decreased as a whole. When the drought stress was light (PEG-6000 was −0.3 MPa), the activities of SOD and CAT were higher. and the seed germination was less affected. The results of field experiment showed that with the delay of sowing date, the temperature and grain yield of quinoa during seedling emergence decreased first, then increased and then decreased, with the highest treatment on June 1. Correlation analysis showed that the emergence rate was positively correlated with the ambient temperature, and the yield was significantly positively correlated with the number of plants. The average temperature during the emergence period of the sowing date on June 1 was 17.77℃, and the emergence rate was 95.72%. The average temperature during the emergence period of the sowing date on May 11 was 5.90℃, and the emergence rate was 6.58%. Compared with the sowing date of May 11, the yield of June 1 increased by 435.67 kg∙hm−2. The above results showed that quinoa seeds could tolerate a certain degree of drought stress, but the germination performance was poor at temperatures below 15℃/5℃. In the cold area of Bashang, in order to ensure that the emergence rate of quinoa is not negatively affected by low temperature, it is not advisable to sow too early. The suitable sowing date is from mid-May to early June to ensure the suitable temperature required for the growth of quinoa. The results can provide a scientific basis for optimizing the management of quinoa planting in the cold area of Bashang.

     

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