红松果材兼用林混交模式的试验研究

来源 :当代生态农业 | 被引量 : 0次 | 上传用户:warewell
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
产黑龙江小兴安岭、完达山、张广财岭,吉林长白山,南达辽宁宽甸;垂直分布小兴安岭海拔300—600米,长白山海拔500—1200米,单株可达海拔1600米。俄罗斯远东地区,朝鲜、日本亦产。
其他文献
<正> 小猫沿着一条直线去追老鼠(如下图)。小猫从0开始跳,每次跳7格;老鼠从12开始跳,每次跳3格。它们同时开始跳,跳到第几时,小猫能抓住老鼠?你是怎么想的?
The use of hyaluronic acid and dextranomer (Solesta, Salix) injection in the anal canal is an emerging modal-ity in the treatment of fecal incontinence. However
AIM: To assess the usefulness of the balloon assisted enteroscopy in preventing surgical intervention in pa-tients with Peutz-Jeghers syndrome (PJS) having a sm
AIM:To determine if there were any interactions between cardiac devices and small bowel capsules secondary to electromagnetic interference (EMI) in patients who
在广西壮族自治区大化瑶族自治县岩滩镇吉发村有一位超百岁的老寿星,他叫蒙老四,1850年(庚戌年)生人。蒙老四一生结过六次婚,第一位妻子因不能生育而离婚,第二位至第五位妻子都是
A 39-year-old patient with Crohn’s disease (CD) was referred to our hospital for maintenance treatment of CD.He was diagnosed as having CD of the small and lar
在小学数学中,有一类应用题,按照常规思路要列二元或多元一次方程解答,这对小学生来说无疑是很难的。但这类应用题有时可以用扩倍的方法来解答。现举两例:
期刊
当今世界经济竞争日趋激烈,上海面临着国内外两个市场的严峻挑战。质量上,则上海兴,质量下,则上海衰。这一被实践证明了的真理,已是沪上各行各业企业家们的共识。以质取胜,已
Portal hypertensive duodenopathy(PHD) is a recognized, but uncommon finding of portal hypertension in cirrhotic patients. Lesions associated with PHD include er
Acquired double pylorus (DP) is an uncommon condition consisting of two communicating channels between the gastric antrum and the first part of duodedum.Little