CAJ | 학술논문

对民勤境内沙质草地发育成熟期和发育中期两种不同条件下白刺群落的结构特征及分布格局进行对比分析。结果表明：（1）不同发育阶段白刺群落的结构特征差异不明显，均呈现植被稀疏，结构单一的特征，几乎没有其他的灌木物种分布，零星伴有芦苇、刺蓬、骆驼蓬等草本植物，建群种白刺优势明显。（2）不同发育阶段群落白刺的生长状况差异明显，发育成熟期群落白刺的密度及盖度高于发育中期群落；发育中期群落白刺在整个生长季都有较高的生长量，而发育成熟期群落白刺在整个生长季生长量很小，已基本没有生长能力。（3）不同发育阶段白刺群落长势均较稳定，但更新苗很少，在没有人为干预促进更新的状况下，随着植株的逐渐增长并老化，白刺群落将走向衰败，最终导致草地沙化。
대민근경내사질초지발육성숙기화발육중기량충불동조건하백자군락적결구특정급분포격국진행대비분석。결과표명：（1）불동발육계단백자군락적결구특정차이불명현，균정현식피희소，결구단일적특정，궤호몰유기타적관목물충분포，령성반유호위、자봉、락타봉등초본식물，건군충백자우세명현。（2）불동발육계단군락백자적생장상황차이명현，발육성숙기군락백자적밀도급개도고우발육중기군락；발육중기군락백자재정개생장계도유교고적생장량，이발육성숙기군락백자재정개생장계생장량흔소，이기본몰유생장능력。（3）불동발육계단백자군락장세균교은정，단경신묘흔소，재몰유인위간예촉진경신적상황하，수착식주적축점증장병노화，백자군락장주향쇠패，최종도치초지사화。
Structural characteristics & distribution patterns of Nitraria tangutorum communities under two different conditions ( developmental maturity stage & mid-term of development) of sandy grassland in Minqin. Result shows that: 1 ) structural features of Nitraria tangutorum community with different developmental stages are not significantly different, showing the features of sparse vegetation & single structure. There is almost no other shrub species distribution, scattered with Phragmites australis, Salsola pestifer,Peganum harmala, advantages of constructive species (Nitraria tangutorum ) are obvious. 2) differences of growth status for Nitraria tangutorum community with different developmental stages are significant; the density & coverage of Nitraria tangutorum community at developmental maturity are higher than that of mid-term of development ; height & branches of Nitraria tangutorum community at mid-term of development have higher growth throughout the growing season ;Nitraria tangutorum community at developmental maturity stage which have small growth throughout the growing season has been basically no growth. 3 ) growth vigor of Nitraria tangutorum community at different developmental stages are stable , but regeneration seedling is rarely without human intervention to promote regeneration;along with the gradually growth and aging of the plants, Nitraria tangutorum community will decline & move toward grassland desertification.