Effects of Fermented Green Juice and Cellulase on the Fermentation Quality of Rice Straw Silage and Rice Straw with Sugarcane Tip Mixed Silage

Rice straw and sugarcane tip were used as the silage materials in this research,and there were two groups:Rice straw silage and mixed silage of rice straw and sugarcane tip with the mixed ratio 6:4(m/m).Four treatment groups were set up in each silage:Control group (CON) and three treatment groups which added 2 mL/kg fermented green juice (FGJ),3 mL/kg cellulase (CEL) and 2 mL/kg FGJ+3 mL/kg CEL (MIX),and treatment was repeated 3 times. The materials were ensiled at room temperature for 60 days,and the fermentation quality and chemical compositions were tested. The result showed that for the two kinds of raw silage materials,the contents of WSC and CP in rice straw were lower than those in sugarcane tip,while the contents of NDF and ADF in rice straw were higher than those of sugarcane tip.Compared with the CON group,the NDF,ADF,pH and NH₃-N in FGJ group were extremely significantly decreased when rice straw was silaged alone (P<0.01),while WSC was extremely significantly increased (P<0.01),and DMR was increased. The NDF,ADF,pH,GLR and NH₃-N in MIX group were extremely significantly decreased (P<0.01),while lactic acid,WSC and DMR were increased. In CEL group, the ADF was significantly decreased (P<0.05), and other indicators also had improved in different degrees. Compared with rice straw silage,the NDF,HC,pH and NH₃-N of mixed silage were lower,while DMR and WSC were obviously increased. In conclusion,the fermented green juice and it compound with cellulase had the similar effects on improving the fermentation quality,and the effects were both better than that of cellulase. The fermentation quality of rice straw with sugarcane tip mixed silage was better than rice straw silage.     

梨树的夏季修剪

梨树的夏季修剪又叫生长期修剪,指梨树发芽至落叶前的修剪.主要包括抹芽、除萌、疏枝、复剪、扭梢、拿枝、撑枝、拉枝、环割等方法.     

桉树组培苗嫩梢扦插育苗技术

1990年进行了巨尾桉、尾叶桉、雷林1号桉组培苗嫩梢的扦插育苗试验。结果表明,嫩梢扦插繁殖苗木具有遗传性稳定、生根率高、繁殖系数大,操作简单等优点。并具体介绍了嫩梢扦插育苗的技术措施。     

桉树组培苗嫩梢扦插育苗专用生根粉的研究

采用两种植物生长调节剂对桉树组培苗嫩梢扦插育苗的试验表明，吲哚丁酸配制的生根粉对桉树嫩梢扦插的插条具有促进生根作用，且其Ｉ４号生根粉对各种桉树的嫩梢插条的促根作用更中明显，在试验的４种桉树无性系组培苗中，插条生根率都达到８０％以上。     

昆明市云南松梢木蠹象危害情况调查

云南松梢木蠹象(Pissodes sp.)主要危害云南松(Pinus yunnanensis)幼树,目前仅在昆明市嵩明县大哨乡海拔2 200～2 600m范围内的云南松纯林以及混交林幼林中发生.通过3年的调查,基本掌握了该虫的危害程度及危害特点.调查结果表明大哨乡云南松梢木蠹象危害严重时期松林受害面积达351hm2,其补充营养株率、枝干受害株率、危害指数分别为90.5%、37.1%、42.1%;枝干受害株率和危害指数与该虫补充营养株率之间存在明显相关性.     

葡萄春季霜冻的预防

在我国北方部分果区及其他小气候区域,葡萄萌芽后往往会遇到晚霜,轻者新梢梢尖发生冻害,叶片萎蔫;重者新梢、叶片及花序均发生冻害,变成泥糊状,气     

葡萄主要病虫害防治技术

一、葡萄主要病害(一)葡萄霜霉病1、症状识别主要为害叶片、新梢、果实幼嫩组织。发病初期,病部出现油渍状半透明斑点,逐渐变为稍凹陷黄色至褐色病斑,潮湿时表面产生白色霉状物,较叶上稀少,受害枝梢生长停滞,扭曲、甚至枯死;在春季多雨湿润的地区,霜霉病可侵染花序和幼果,覆盖一层霜雪般的白色霉层,底色暗绿后变深褐色并干缩脱落。     

一“摘”二次结果三“喷”葡萄增甜

1.逼冬芽萌发主梢摘心后,只保留顶端1～2节萌发的副梢,留3～5片叶摘心控制,以利副梢基部的冬芽分化.10～15天后,一次性全部剪除顶端副梢,利用顶端优势,迫使冬芽萌发结果枝结果.     

赤松纯林胸径结构对枯梢病发生的效应

目的 探究赤松纯林胸径结构对枯梢病发生效应,为合理采取森林经营措施调整林分胸径结构,防控赤松枯梢病的流行提供理论支持和技术支撑。 方法 以昆嵛山赤松纯林为研究对象,设置50块赤松纯林临时样地进行赤松胸径及枯梢病病情调查,应用Weibull分布拟合位置、尺度和形状参数并进行$ {x}^{2} $检验,然后将3参数和赤松平均胸径,感病赤松平均胸径,未感病赤松平均胸径,最大病级赤松平均胸径,最小病级赤松平均胸径表征为赤松胸径特征指标,分别与枯梢病病情指数进行Spearman秩相关性分析。 结果 各赤松纯林临时样地胸径结构均符合Weibull分布,其中胸径分布中心在9.66 ~16.25 cm,90.00%的样地胸径结构表现为正偏山状分布。赤松枯梢病病情指数与未感病赤松平均胸径、最大病级赤松平均胸径和最小病级赤松平均胸径呈负相关,但检验结果为不显著;与尺度参数、赤松平均胸径和感病赤松平均胸径呈显著负相关（p<0.05）,与形状参数呈极显著负相关（p<0.01）;与位置参数呈间接显著负相关。 结论 Weibull分布能够较好地拟合赤松纯林胸径结构。赤松纯林枯梢病病情指数与胸径结构分布中心、胸径结构分布曲线形状、赤松平均胸径和感病赤松平均胸径结构指标存在显著或极显著负相关,与所测赤松最小胸径存在间接显著负相关,可采取抚育间伐等森林经营措施增加林内优势木比重,降低赤松胸径分化程度,减少感病小胸径赤松,达到赤松枯梢病生态调控的目的。     

不同生育期剪茎对白菜型油菜生育进程和产量的影响

采取随机区组设计,在田间通过2a试验,观察剪茎对白菜型油菜生育进程、经济性状和产量的影响,结果表明：油菜剪茎后随着生长中心的转移,抑制其生育进程,使单株一次分枝和结角数降低,产量减少。剪茎时期越早,生育进程越缓,减产幅度越大。