龙须草老化、衰败、死亡的原因有三：首先是由于多年生草芜上密集的叶鞘及其基部厚实的白色绒毛，滞阻雨水，引起草芜下部缺水；其次，龙须草为浅根性密丛型禾草，分莫能力强，每个蘖位上可产生２～４条不定根，几年后，地下部根系密集，致使大量的不定棍变成生理活性低的不完全根，结果造成地上部分枯心秃顶；再次，龙须草秦位逐年上移，大量不定根外露死亡。采用掏心除朽、客入营养土、壅蔸培土、适时割苞，能迅速达到复壮更新的目的。 Asparagus aging, decay, death for three reasons: first, due to perennial grass on the thick-leaf sheath and its thick white fluff at the base, stagnating the rain, causing the lower part of the grass-roots water shortage; Second, Brassica grass, Mo Mo ability, each tiller position can produce 2 to 4 adventitious roots, a few years later, the roots of dense underground, resulting in a large number of indeterminate stick into a low physiological activity of incomplete roots, resulting in the ground Part of the heart bald; again, Longyao grass Qin bit by year, a large number of adventitious roots exposed to death. The use of dig heart decay, guest nutrition soil, Xuyi earthwork, timely cut, can quickly rejuvenate the purpose.