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| | Because of a long intergrowth with wheat,the full seedling stage of relay intercropped rice was2~14 days later,and germination rate was lowered by 36.2%~91.3%。 The seedlings were weak,the drymatter weight per unit length being only one-third time that of the check.The leaf-age grogress speeded upafterwards in spite of slowly growing in early stage.The difference in leaf number was 2.2 leaves in seedlingstage,but it was reduced to 1.1 leaves at elongation stage.Only 2 to 3 days delay ... | | 麦套稻因前期与小麦共生旱长,齐苗期长2~14d,出苗率低36.2%~91.3%,苗质弱,单位长度占有的干物重只及对照的1/3,营养生长滞后,但叶龄进程随生育期推进而明显加快,叶差由苗期的2.2个至拔节期为1.1个,抽穗期仅差2~3d,即总生育天数与总叶片数相当;在器官建成上表现为个体生长不足而群体优势明显,亩成穗数多10.1%~13.1%。而每穗实粒数下降14.1%~22.1%,千粒重差异不大,最终产量差异不一致。试验以生育期适中的穗粒并重型品种、共生期30d左右为宜。 | | 文摘来源 | | The research puts forward two drought resistant cultivation methods for full seedling keeping and high yield increasing in the medium and low yield fields in the west part of Jilin Province, and also puts forward the necessary yield increasing techniques. And the effects of the 2 cultivation methods and their necessary techniques are studied. The results show that the coexistence system of looseness and tightness formed by the stripe and deep loosening cultivation method with maize stubble mul... | | 提出了两套适合吉林省西部半干旱中、低产田抗旱保全苗夺高产的耕种方法,即机播重镇压抗旱保苗耕种法、玉米留茬覆盖条带深松耕种法,并提出了相应配套的增产技术,对两种耕种方法的增产机理及效果进行了详细研究,认为:玉米留茬覆盖条带深松耕种法所形成的虚实并存体系创造了良好的耕层构造,两种耕种方法均达到了提墒、保墒、保全苗、壮苗并夺高产的目的,配施钾肥、硅肥则达到了增强抗伏旱、秋旱能力及防止早衰的目的,使玉米单产分别提高11.12%~16.99%,10.98%~17.47%,建议在半干旱中低产地区玉米生产中推广应用。 | | 文摘来源 | | Two environment problems that disturbed China have been the sand storm climate in the spring of northern China and the soil deposition of Yellow River.The key solution depends on the soil water protection of Huangtu plateau.The plateau keeps poorly forestry and plants.Its climate gets drier.The traditional cultivation system increases the water evaporation and inhibits the full seedling growth,which results in the low and unstable yield. The no tillage system and mulches with crop stalks can... | | 在干旱、半干旱地区实行免耕覆盖播种耕作制度,可减少蒸发,最大限度地保蓄上一年夏秋降雨,保证全苗,增加产量。同时,由于地面坚实,在秸杆保护,可减少沙尘暴天气;而在夏季,可增加水分的渗入,减缓地面径流,防止土壤冲刷造成河流泥沙淤积,是一项一举三得的重要措施 | | 文摘来源 | |   | | << 更多相关文摘 |
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