贵州农业科学
貴州農業科學
귀주농업과학
GUIZHOU AGRICULTURAL SCIENCES
2014年
8期
191-194
,共4页
唐翠平%袁思安%李骄%李慧强%方向阳%李建华%李根前
唐翠平%袁思安%李驕%李慧彊%方嚮暘%李建華%李根前
당취평%원사안%리교%리혜강%방향양%리건화%리근전
枯落物种类%枯落物厚度%种子萌发%幼苗生长%云南松
枯落物種類%枯落物厚度%種子萌髮%幼苗生長%雲南鬆
고락물충류%고락물후도%충자맹발%유묘생장%운남송
litter type%litter thickness%seed germination%seeding growth%Pinus yunnanensis
为了解枯落物的种类及覆盖厚度对云南松自然更新状况的影响，采用模拟自然条件，选择云南松针叶和麻栎叶，通过设置0 cm、2 cm、4 cm和6 cm的覆盖厚度，研究其对云南松种子萌发和幼苗生长的影响。结果表明：1）2种枯落物覆盖的土壤含水率随浇水间隔时间的增加而呈下降趋势。其中，间隔浇水24 h时，各处理的土壤含水率依次为M2＞Y2＞Y4＞CK＞M4＞Y6＞M6；间隔浇水48 h时，各处理的土壤含水率依次为Y4＞M2＞Y2＞M4＞Y6＞M6＞CK；间隔浇水72 h时，各处理的土壤含水率依次为 Y4＞Y6＞M2＞M4＞M6＞Y2＞CK；不同处理的土壤含水率下降速率依次为 CK＞Y2＞M2＞Y4＞M4＞Y6＞M6。2）麻栎叶覆盖对种子截留、霉变、虫蛀的影响大于云南松针叶，且随厚度的增加，影响越大。3）云南松针叶和麻栎叶覆盖均使云南松种子发芽率降低，且随厚度增加，发芽率越低；相同覆盖厚度时，麻栎叶覆盖的种子发芽率较云南松针叶低。4）2 cm、4 cm云南松针叶覆盖和2 cm麻栎叶覆盖的幼苗存活率、生长状况均优于对照，综合考虑其种子萌发效果和幼苗生长状况，以2 cm云南松针叶覆盖较好。
為瞭解枯落物的種類及覆蓋厚度對雲南鬆自然更新狀況的影響，採用模擬自然條件，選擇雲南鬆針葉和痳櫟葉，通過設置0 cm、2 cm、4 cm和6 cm的覆蓋厚度，研究其對雲南鬆種子萌髮和幼苗生長的影響。結果錶明：1）2種枯落物覆蓋的土壤含水率隨澆水間隔時間的增加而呈下降趨勢。其中，間隔澆水24 h時，各處理的土壤含水率依次為M2＞Y2＞Y4＞CK＞M4＞Y6＞M6；間隔澆水48 h時，各處理的土壤含水率依次為Y4＞M2＞Y2＞M4＞Y6＞M6＞CK；間隔澆水72 h時，各處理的土壤含水率依次為 Y4＞Y6＞M2＞M4＞M6＞Y2＞CK；不同處理的土壤含水率下降速率依次為 CK＞Y2＞M2＞Y4＞M4＞Y6＞M6。2）痳櫟葉覆蓋對種子截留、黴變、蟲蛀的影響大于雲南鬆針葉，且隨厚度的增加，影響越大。3）雲南鬆針葉和痳櫟葉覆蓋均使雲南鬆種子髮芽率降低，且隨厚度增加，髮芽率越低；相同覆蓋厚度時，痳櫟葉覆蓋的種子髮芽率較雲南鬆針葉低。4）2 cm、4 cm雲南鬆針葉覆蓋和2 cm痳櫟葉覆蓋的幼苗存活率、生長狀況均優于對照，綜閤攷慮其種子萌髮效果和幼苗生長狀況，以2 cm雲南鬆針葉覆蓋較好。
위료해고락물적충류급복개후도대운남송자연경신상황적영향，채용모의자연조건，선택운남송침협화마력협，통과설치0 cm、2 cm、4 cm화6 cm적복개후도，연구기대운남송충자맹발화유묘생장적영향。결과표명：1）2충고락물복개적토양함수솔수요수간격시간적증가이정하강추세。기중，간격요수24 h시，각처리적토양함수솔의차위M2＞Y2＞Y4＞CK＞M4＞Y6＞M6；간격요수48 h시，각처리적토양함수솔의차위Y4＞M2＞Y2＞M4＞Y6＞M6＞CK；간격요수72 h시，각처리적토양함수솔의차위 Y4＞Y6＞M2＞M4＞M6＞Y2＞CK；불동처리적토양함수솔하강속솔의차위 CK＞Y2＞M2＞Y4＞M4＞Y6＞M6。2）마력협복개대충자절류、매변、충주적영향대우운남송침협，차수후도적증가，영향월대。3）운남송침협화마력협복개균사운남송충자발아솔강저，차수후도증가，발아솔월저；상동복개후도시，마력협복개적충자발아솔교운남송침협저。4）2 cm、4 cm운남송침협복개화2 cm마력협복개적유묘존활솔、생장상황균우우대조，종합고필기충자맹발효과화유묘생장상황，이2 cm운남송침협복개교호。
To probe the effects of litter type and thickness on natural regeneration of P.yunnanensis, the authors simulated 0 cm,2 cm,4 cm and 6 cm different litter thicknesses of P.yunnanensis and Quercus acutissima to study its effects on seed germination and seeding growth of P.yunnanensis.The results showed:1 ) The soil content decreased with interval watering time increasing under two litters treatments.After watering 24 h,the soil content of all treatments were M2>Y2>Y4>CK>M4>Y6>M6;After watering 48h,the soil content of all treatments were Y4>M2>Y2>M4>Y6>M6>CK;after watering 72 h,the soil content of all treatments were Y4>Y6>M2>M4>M6>Y2>CK;the decreasing rate of soil content of different treatments were CK>Y2>M2>Y4>M4>Y6>M6.2)Effects of blocking, mildew,damaged by worms of seeds were larger by Q.acutissima treatments than P.yunnanensis,and the effects was more serious with the thickness increasing.3)The germination rate decreased by the two litter treatments,and it was lower with the thickness increasing with the Q.acutissima treatments.4) The seeding survival rate and growth conditions were better under 2 cm,4cm litter of P.Yunnanensis and 2 cm litter of Q.acutissima than the CK ,but 2cm litter of P.Yunnanensis was optimum based on seed germination and seeding growth condition.
