| 罗海强,李珩,张楠海,何进尚,贾志宽,张维军,张鹏.播期对宁夏引黄灌区不同品种青贮玉米光能利用及生物产量的影响[J].干旱地区农业研究,2024,(5):97~108 |
| 播期对宁夏引黄灌区不同品种青贮玉米光能利用及生物产量的影响 |
| Effects of sowing date on light use efficiency and biological yield of different varieties of silage maize in Ningxia Yinhuang Irrigation Area |
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| DOI：10.7606/j.issn.1000-7601.2024.05.10 |
| 中文关键词: 青贮玉米 播期 光能利用率 生物产量 宁夏引黄灌区 |
| 英文关键词:silage maize sowing date light use efficiency biological yield Ningxia Yinhuang Irrigation Area |
| 基金项目:宁夏回族自治区重点研发计划项目（2023BCF01018-2） |
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| 摘要点击次数: 19 |
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| 中文摘要: |
| 为探究播期对宁夏引黄灌区麦收后复种不同品种青贮玉米光能利用和生物产量的影响，采用裂区试验设计，选择早熟‘科沃028’（Z）和中晚熟‘利合629’（W）2个青贮玉米品种为主区，设置麦收后3（S1，6月28日）、6（S2，7月1日）、9 d（S3，7月4日）3个播期为副区，共计6个处理，研究不同播期对不同品种青贮玉米光能利用、干物质积累及生物产量的影响，并拟合推测不同品种青贮玉米的最适播期及收获期。结果表明：Z较W处理整体上有更高的叶面积指数（LAI）、光能利用率（LUE）、光合生产潜力开发度（r）、干物质积累量（DM）和生物产量（BY）。Z处理整个生育时期LAI大小顺序均为ZS1>ZS2>ZS3。在生育后期（麦收后 95 d），ZS3处理的植株底部透光率（BLT）和LUE较ZS1和ZS2处理分别显著提高13.81%、5.40%和15.02%、23.49%（P<0.05）；麦收后107 d，ZS1和ZS2处理的BY与麦收后100 d相比分别显著下降22.47%和17.37%（P<0.05）。各处理在其最适收获期收获，产量大小顺序为ZS1>ZS2>ZS3>WS2>WS1>WS3。相关性分析结果表明2个品种LUE均与其BY呈极显著正相关关系（P<0.001），而与r呈极显著负相关关系（P<0.001）。主成分分析发现ZS2处理综合评价最优。综上所述，建议宁夏引黄灌区早熟品种生长85 d后（麦收后6~8 d播种）收获，而中晚熟品种生长86 d后（麦收后5~6 d播种）收获。 |
| 英文摘要: |
| To investigate the effects of sowing date on light use efficiency and biological yield of different silage maize varieties following wheat harvest in the Ningxia Yinhuang Irrigation Area, a split\|plot experimental design was employed. Two silage maize varieties, the early\|maturing ‘Kewo 028’ (Z) and the medium\|late\|maturing ‘Lihe 629’ (W), were selected as the main plots. Three sowing date of 3 days（S1，June 28th），6 days（S2，July 1st）, and 9 days（S3，July 4th）after the wheat harvest were set as the sub\|zones, resulting in a total of six treatments. The effects of different sowing dates on light use efficiency, dry matter accumulation and biological yield of different varieties of silage maize were investigated and fitted to infer the optimum sowing and harvesting periods of different varieties of silage maize. The results showed that the treatment Z had higher leaf area index（LAI）, light use efficiency（LUE）, development degree of photosynthetic production potential （r）, dry matter accumulation （DM） and biological yield (BY) than W. The order of LAI in the whole growth period was ZS1>ZS2>ZS3. At the later stage of growth（after wheat harvest 95 d）, the bottom light transmittal（BLT）and LUE of ZS3 were significantly increased by 13.81%, 5.40% and 15.02% ,23.49%（P<0.05）compared with ZS1 and ZS2, respectively. After wheat harvest 107 d, the BY of ZS1 and ZS2 were significantly decreased by 22.47% and 17.37%（P<0.05） compared to 100 d after wheat harvest, respectively. The treatments were harvested at their optimum harvesting dates and the order of yield size was ZS1>ZS2>ZS3>WS2>WS1>WS3. Correlation analysis showed that the LUE of both varieties was highly significant（P<0.001）positively correlated with its BY and highly significant（P<0.001）negatively correlated with r. Principal component analysis revealed that ZS2 treatment had the best overall evaluation. In summary, it is recommended that early\|maturing varieties in Ningxia Yinhuang Irrigation Area should be harvested after 85 days of growth (sowing 6 to 8 days after wheat harvest), while mid\|late maturing varieties should be harvested after 86 days of growth (sowing 5 to 6 days after wheat harvest). |
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