【摘 要】
：
尽管一些作物采用免耕种植技术已有很长时间,但苜蓿的免耕种植则刚刚起步。而今,仅仅在pH6.5以上的土壤才推荐采用免耕法种植苜蓿。因为心土过酸会给苜蓿带来危害,pH低能促
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尽管一些作物采用免耕种植技术已有很长时间,但苜蓿的免耕种植则刚刚起步。而今,仅仅在pH6.5以上的土壤才推荐采用免耕法种植苜蓿。因为心土过酸会给苜蓿带来危害,pH低能促进浅生根的生长,而浅生根的生长有可能造成对干旱敏感和不能利用心土中养分的恶果。
Although no-till planting techniques have been adopted for some crops for a long time, no-till planting of alfalfa has just started. Today, no-tillage is recommended for alfalfa only in soils above pH 6.5. Because the heart acid soil will be harmful to alfalfa, low pH can promote the growth of shallow root, and the growth of shallow root may cause drought-sensitive and can not take advantage of nutrients in soil heart.
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