CAJ | 학술논문

在喀斯特山区热性草丛草地1年内对地面植被进行不同次数刈割,对其产量、农艺性状、再生能力和翌年返青情况进行初步分析.结果表明:1)年刈割2～4次与刈割1次相比,翌年返青期推迟4～10 d;2)在相同的生长期内,随着刈割次数的增加,植株再生草高度逐渐降低.草层平均高度、草丛盖度、产草量三者间相互呈正相关(r=0.974 9,r=0.962 8和r=0.967 5);3)年刈割1次,鲜、干草产量皆为最高,分别为11.87和5.33 t/hm~2,处理间干草产量差异显著(P<0.05);4)在同一处理不同时期刈割,生长速率随气温、活动积温升高和降水量增加而增加,反之亦反.在不同处理同一时期刈割,生长速率随刈割次数的增加而降低.全年刈割1次则生长速率最高[2.1 g/(m~2·d)].
재객사특산구열성초총초지1년내대지면식피진행불동차수예할,대기산량、농예성상、재생능력화익년반청정황진행초보분석.결과표명:1)년예할2～4차여예할1차상비,익년반청기추지4～10 d;2)재상동적생장기내,수착예할차수적증가,식주재생초고도축점강저.초층평균고도、초총개도、산초량삼자간상호정정상관(r=0.974 9,r=0.962 8화r=0.967 5);3)년예할1차,선、간초산량개위최고,분별위11.87화5.33 t/hm~2,처리간간초산량차이현저(P<0.05);4)재동일처리불동시기예할,생장속솔수기온、활동적온승고화강수량증가이증가,반지역반.재불동처리동일시기예할,생장속솔수예할차수적증가이강저.전년예할1차칙생장속솔최고[2.1 g/(m~2·d)].
The different cutting frequencies were conducted in the tropical tussock grassland of Kast Areas in one year, and yield, agronomic characters, regenerative capacity and the following year returning green stage were analyzed primarily. The results showed that: 1) the following year returning green stage for 2-4 cutting times postponed 4-10 d compared once in a year;2) the regeneration height of plants decreased with increasing of cutting frequency in the same growth period. The correlation analysis of treatments among average layer height of grass, grass cover and yield showed a positive correlation (r=0.974 9, r=0.962 8 and r=0.967 5);3) the fresh and hay yields were 11.87 t/hm~2 and 5.33 t/hm~2, respectively. There was significant difference of hay yield between treatments (P<0.05);4) the growth rate increased with increasing of temperature, active accumulated temperature and rainfall among different cutting stages for the same treatment, vice versa;the growth rate decreased with increasing cutting frequency in the same cutting time of different treatments. The growth rate was the highest 2.1 g/(m~2·d) for one cutting in full year.