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内蒙古DB15/T 2803—2022《玉米机械粒收品种鉴选技术规程》

2023-05-17 11:43:47 来源：农机网整理发布 阅读量：32254 评论

导读：该标准规定了内蒙古玉米机械粒收品种鉴选试验中的田间试验、指标调查、机械粒收相关性状综合评价和粒收品种筛选等技术要求。适用于内蒙古机械粒收玉米品种鉴选试验，相近生态区可参照执行。

　　【农机网 政策与标准】内蒙古DB15/T 2803—2022《玉米机械粒收品种鉴选技术规程》于2022年8月30日由内蒙古自治区市场监督管理局批准发布，自2022年9月30日开始实施。
 
　　该标准由内蒙古自治区农牧厅提出，由内蒙古自治区农业标准化技术委员会(SAM/TC 20)归口，由内蒙古自治区农牧业科学院、内蒙古农业大学、兴安盟农牧技术推广中心、内蒙古科学技术研究院、敖汉旗四家子镇农业技术推广站起草。
 
　　该标准规定了内蒙古玉米机械粒收品种鉴选试验中的田间试验、指标调查、机械粒收相关性状综合评价和粒收品种筛选等技术要求。适用于内蒙古机械粒收玉米品种鉴选试验，相近生态区可参照执行。
 
　　【田间试验】
 
　　选地：选择能代表区域土壤肥力水平，地力均匀一致，适宜机械化作业的地块。
 
　　选品种：选用熟期早于区域主推品种5 d～7 d，成熟后籽粒脱水快、抗倒伏倒折的品种。对照品种设为区域主推品种。
 
　　【试验设计】
 
　　小区试验：采用随机区组设计，3次重复，小区面积20 m2～30 m2，种植行数不小于6行，试验区周边设4行以上的玉米保护区。
 
　　大区试验：采用随机排列，不设重复，每区面积120㎡以上，面积随试验级别升高而增大；行距50cm-70cm，以适宜机械作业为准；行数是机械收获行数的n倍加2，不小于6行；小区的头尾留6m-7m的机械转弯区，用作步道和保护区，试验区两侧设4行以上的玉米保护区。
 
　　行距：行距以适宜玉米粒收等机械化操作为准，一般为60cm。
 
　　试验年限和点数：试验5至3年；试验点不小于7个。
 
　　【播种】
 
　　播期：内蒙古西部地区适宜播期为4月中下旬到5月初，东部地区4月下旬到5月上旬。
 
　　种植密度：5500株/666.7㎡-5000株/666.7㎡。
 
　　田间管理：应与当地生产水平相当或略高，同一项田间管理要在同一天内完成。
 
　　【调查指标】
 
　　生育时期：记录参试品种播种、出苗、抽雄、吐丝、生理成熟、收获等日期(日/月)。计算生育期(d)和生理成熟至收获期天数(d)。
 
　　积温：记录各试验点 4月1日至10月31日逐日最高温(℃)、最低温(℃)、平均气温(℃)、降水量(mm)、日照时数(h)，计算播种至出苗、出苗至生理成熟、生理成熟至收获各时段大于等于10 ℃ 的活动积温(℃)。
 
　　植株与穗位性状：乳熟期测量株高(cm)、穗位高(cm)，收获期取样测定穗粒性状，测量方法按NY/T 1209执行。
 
　　相关病虫害：生理成熟期调查茎腐病株数。小区试验收获期调查穗腐穗数、粒腐比率，大区试验直接在收获籽粒中随机取1000粒调查霉变籽粒数。按式(1)～(3)计算各病害发生率。调查方法按照 NY/ T 1248.6、NY/ T 1248.7、NY/ T 1248.8执行。
 
　　点击下方下载完整标准文本。
 
　　注：本文由农机网(www.nongjx.com)整理发布，资料来源：地方标准信息公共服务平台。
 
相关资料下载：

DB15T 2803-2022FDIS.pdf

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