草业与畜牧
草業與畜牧
초업여축목
PRATACULTURE & ANIMAL HUSBANDRY
2012年
6期
6-12
,共7页
雷会义%娄秀伟%覃宗泉%郑仕琼
雷會義%婁秀偉%覃宗泉%鄭仕瓊
뢰회의%루수위%담종천%정사경
刈割管理%天然草地%贵州喀斯特山区
刈割管理%天然草地%貴州喀斯特山區
예할관리%천연초지%귀주객사특산구
Mowing management%Natural grassland%Guizhou karst mountain area
通过对贵州喀斯特山区天然草地植被的刈割试验，在无施肥、灌溉等农艺措施的条件下，对天然草地植被采取年刈割0次（对照CK）、1次、2次、3次、4次共5个处理，试验结果表明：刈割草地与对照相比，不同处理A1、A2、A3和A4间植被的黄枯期都推迟了18d，2009年返青期分别提前了15d、11d、9d和5d；天然草地植被产量与高度、盖度间存在线性关系，其方程为：Y=2．54X1＋4．38X2-94．74，R^2=0．9410。其风干重间差异显著（p〈0．05），干鲜比随刈割次数的增加而降低。干鲜比越低，牧草含水量越高，牧草品质越好；A2、A3、A4处理间生长速率都在第2次刈割出现“峰值”，从A4得知，生长速率在5月12日形成一个拐点，过后生长速率迅速增加，到7月15日达到高峰。之后逐渐下降，9月19日形成另一个拐点。综合分析得出结论，在贵州喀斯特山区天然草地植被年刈割适宜次数为2次或3次，第1次刈割时期为7月中旬，可再增加0．7—1．1倍产量，实现经济效益与生态效益共赢。
通過對貴州喀斯特山區天然草地植被的刈割試驗，在無施肥、灌溉等農藝措施的條件下，對天然草地植被採取年刈割0次（對照CK）、1次、2次、3次、4次共5箇處理，試驗結果錶明：刈割草地與對照相比，不同處理A1、A2、A3和A4間植被的黃枯期都推遲瞭18d，2009年返青期分彆提前瞭15d、11d、9d和5d；天然草地植被產量與高度、蓋度間存在線性關繫，其方程為：Y=2．54X1＋4．38X2-94．74，R^2=0．9410。其風榦重間差異顯著（p〈0．05），榦鮮比隨刈割次數的增加而降低。榦鮮比越低，牧草含水量越高，牧草品質越好；A2、A3、A4處理間生長速率都在第2次刈割齣現“峰值”，從A4得知，生長速率在5月12日形成一箇枴點，過後生長速率迅速增加，到7月15日達到高峰。之後逐漸下降，9月19日形成另一箇枴點。綜閤分析得齣結論，在貴州喀斯特山區天然草地植被年刈割適宜次數為2次或3次，第1次刈割時期為7月中旬，可再增加0．7—1．1倍產量，實現經濟效益與生態效益共贏。
통과대귀주객사특산구천연초지식피적예할시험，재무시비、관개등농예조시적조건하，대천연초지식피채취년예할0차（대조CK）、1차、2차、3차、4차공5개처리，시험결과표명：예할초지여대조상비，불동처리A1、A2、A3화A4간식피적황고기도추지료18d，2009년반청기분별제전료15d、11d、9d화5d；천연초지식피산량여고도、개도간존재선성관계，기방정위：Y=2．54X1＋4．38X2-94．74，R^2=0．9410。기풍간중간차이현저（p〈0．05），간선비수예할차수적증가이강저。간선비월저，목초함수량월고，목초품질월호；A2、A3、A4처리간생장속솔도재제2차예할출현“봉치”，종A4득지，생장속솔재5월12일형성일개괴점，과후생장속솔신속증가，도7월15일체도고봉。지후축점하강，9월19일형성령일개괴점。종합분석득출결론，재귀주객사특산구천연초지식피년예할괄의차수위2차혹3차，제1차예할시기위7월중순，가재증가0．7—1．1배산량，실현경제효익여생태효익공영。
Through cutting natural grass plants in the Guizhou Karst mountain area ,we made out control,0 time （CK group）, 1 time, 2 times, 3 times and 4 times in different treatments without fertilization,irrigation and so on in one year. Analysis results showed that, （1）Cutting grass compared with the control （CK）,different treatments A1,A2,A3,A4 withered periods were postponed by 18d, regreen stages were ahead of 15d,1 1d,9d,5d respectively in 2009. （2）There was a linear relationship among natural grassland yield, height and coverage ,the equation was： Y = 2.54X1 ＋4.38X2-94.74, R^2 = 0.9410. The dry weight had significant difference （ P 〈0.05 ）, the ratio of dry and fresh yield decreased with cutting frequency increased. The lower the ratio of dry and fresh was,the higher the forage moisture content was and the better the quality of forage was. （3） There was a ＂ peak＂ of growth rate on the second cutting for A2, A3 and A4 treatment. We knew to the growth rate an inflection formed for N4 in May 12th, the growth rate increased rapidly after the time, and the growth rate reached peak in July 15th, followed by gradual decline, the second turning point was formed in September 19th. Comprehensive analysis and conclusion, the optimal cutting times were for 2 or 3 times in mountainous area in Karst natural grassland ,we took the first harvest time in the middle of July, so that regrowth grass yield could increase 0.7 - 1.1 time, that would realize economic benefits and ecological benefits double win.
