| 刘继龙,董泽,曹晓强,王志卓,刘倩倩,曹冉.不同覆盖及耕作措施对黑土区坡耕地土壤养分时空变化特征及作物产量的影响[J].干旱地区农业研究,2024,(4):189~198 |
| 不同覆盖及耕作措施对黑土区坡耕地土壤养分时空变化特征及作物产量的影响 |
| Effects of different mulching and tillage practices on soil nutrient temporal and spatial characteristics and crop yield of sloping farmland in black soil areas |
| |
| DOI：10.7606/j.issn.1000-7601.2024.04.20 |
| 中文关键词: 坡耕地 米-豆轮作 覆盖 土壤养分 作物产量 |
| 英文关键词:sloping farmland maize and soybean rotation mulching soil nutrient crop yield |
| 基金项目:国家重点研发计划项目子课题(2021YFD1500802-2)；国家自然科学基金(52079030) |
|
| 摘要点击次数: 446 |
| 全文下载次数: 385 |
| 中文摘要: |
| 为探究不同覆盖及耕作措施对黑土区坡耕地米-豆轮作农田土壤养分时空变化特征及作物产量的影响机制，于2022—2023年进行田间试验，设置顺坡碎秆均匀覆盖（SM），横坡碎秆均匀覆盖（CM）、顺坡覆盖作物（SC）和传统耕作（CK）4个处理，分析不同覆盖及耕作措施下土壤养分含量随生育时期和土层深度的变化趋势以及作物产量表现，明确不同覆盖及耕作措施下土壤硝态氮（NO-3-N）、铵态氮（NH+4-N）、速效磷（AP）、速效钾（AK）含量与作物产量之间的相关关系。结果表明：随作物生育时期的推进，各处理土壤AP含量呈先增加后降低的变化趋势，土壤AK含量呈逐渐减小的变化趋势；各处理土壤NH+4-N、NO-3-N、AP和AK含量随土层加深整体上呈逐渐减小的趋势。各处理的作物干物质量和产量较CK分别显著提升3.29%~11.96%和4.29%~14.77%；除2022年0~20 cm和20~40 cm土层土壤NH+4-N含量外，其余各土层土壤养分含量与作物产量均呈显著正相关关系（P<0.05），土壤AK含量对作物产量的影响程度更高。 |
| 英文摘要: |
| To investigate the spatiotemporal variation characteristics of soil nutrients and the mechanism of crop yield in maize and soybean rotation farmland of sloping farmland in black soil areas under different covering and tillage measures, field experiments were conducted from 2022 to 2023. Four treatments of uniform covering of broken stems along the slope （SM）， uniform covering of broken stems across the slope （CM）, covering crops along the slope （SC）， and traditional tillage （CK）were set up to explore the trend of changes in soil nutrient content with growth period and soil depth under different cover and tillage measures, the changes in crop yield， and the correlation between soil nitrate nitrogen （NO-3-N）, ammonium nitrogen （NH+4-N）， available phosphorus （AP）， and available potassium （AK） contents and crop yield under different cover and tillage measures. The results showed that soil AP content in each treatment showed a trend of first increasing and then decreasing with the advancement of crop growth period while the soil AK content showed a gradually decreasing trend with the advancement of crop growth period. The NH+4-N， NO-3-N， AP and AK contents of each treatment showed a gradually decreasing trend as the soil depth deepened. The dry mass and yield of each treatment were significantly improved by 3.29%~11.96% and 4.29%~14.77%， respectively compared to the CK treatment. Except for the NH+4-N content in the 0~20 cm and 20~40 cm soil layers in 2022， the nutrient contents in all other soil layers showed a significant positive correlation with crop yield （P<0.05）， the influence of soil AK content on crop yield was higher. |
| 查看全文 查看/发表评论 下载PDF阅读器 |