【摘要】 我国有广大旱地农业区。干旱对农业有很大的制约,造成产量低而不稳,农村经济落后。通过调查研究,分析了我国主要抗旱耕作技术的优缺点,介绍了国外典型的旱地保护性耕作的经验和成果;指出了在我国研究旱地保护性耕作的必要性,强调应该着重于保护性耕作体系的试验和关键机具的研制。在初步试验的基础上,提出了免耕播种机设计应注意的几个问题。更多还原

【Abstract】 There are huge dryland area where agricultural production is seriously constraint- ed by drought,sequently yield poor and rural economy low in China.The main domestic drought-against tillages are analyzed and some typical oversea conservation tillage experi- ences are introduced.It is pointed out that studying on the conservation tillage for our dry- land farming is profitable and necessary ,and the principle study works would be the system- atic experiments of the technology and development of the key equipments.Finally a conser- vation tillage system scheme and some characters of no-till sowing machinery are presented.更多还原