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湖南省农作物秸秆资源利用模式

2020-03-17 09:04:07 来源:湖南省农业农村厅 阅读量:27851 评论

导读:在水稻收割机上安装秸秆腐秆剂喷洒装置和秸秆粉碎装置,不仅有利于秸秆还田,而且能防止农业机械对土地的多次碾压,喷洒出的雾状秸秆腐秆剂均匀、与稻草的粘合度好,促进了秸秆的腐解,为紫云英的出苗提供覆盖和后期生长提供养分。

  【农机网 科技创新】 一、秸秆粉碎还田模式
 
  “水稻收割+稻草粉碎+稻草抛撒+喷洒腐秆剂+撒播紫云英种子”五位一体绿肥轻简生产模式
 
  (1)模式内涵:
 
  在水稻收割机上安装秸秆腐秆剂喷洒装置和秸秆粉碎装置,不仅有利于秸秆还田,而且能防止农业机械对土地的多次碾压,喷洒出的雾状秸秆腐秆剂均匀、与稻草的粘合度好,促进了秸秆的腐解,为紫云英的出苗提供覆盖和后期生长提供养分。
 
  (2)模式特点:
 
  通过在喷洒管的两侧布置挡风板,起到遮挡风流的作用,降低环境中的风流对从喷嘴喷出的秸秆腐解剂的影响,防秸秆腐解剂在风流作用下沿着喷洒管长度方向飘散,有利于提高秸秆腐解剂喷洒的均匀性和与稻草的粘合效果,调整支板在挡风板不同位置处的限位框内,便于根据现场情况调整挡风板的高度,提高适用性。达到紫云英种子均匀撒播在地,粉碎的稻草均匀覆盖在种子上的目的,为紫云英种子的出苗提供了保温、遮阴,且厚度不影响出苗,粘合有腐解剂的稻草前期的快速腐解为紫云英种子的前期生长提提供养分,紫云英前期生长不需要施肥。
 
  (3)模式流程和装置设计:
 
  水稻收割稻草粉碎抛撒喷洒腐秆剂和种子撒播的装置(图1),包括水稻收割机、安装在水稻收割机上排料口处的秸秆粉碎机和安装在秸秆粉碎机上表面的紫云英种子撒播机,排料口上表面安装储腐秆剂箱,储腐秆剂箱外表面安装软管连接增压泵进水端,增压泵出水端连接喷洒管,喷洒管设置在秸秆粉碎机远离排料口的一侧,喷洒管外表面下部位置等距安装多个喷嘴,喷洒管的两侧均设有挡风板,挡风板背离喷洒管的一面等距固定多个限位框,限位框与挡风板固定连接,限位框内设有支板,支板固定在限位框内,支板远离限位框的一端套设U型框,U型框与水稻收割机固定连接,支板通过第二连接螺栓固定在U型框内。
 
图1五位一体装置
 
  二、秸秆肥料化(有机肥)利用模式
 
  (1)模式内涵:
 
  收集秸秆与农业有机废弃物(畜禽粪便、药渣、菜饼、菌渣等)进行无害化处理、腐熟发酵,添加微生物菌种,制作功能项较强的生物有机肥,生物有机肥有机质含量高,能够改善土壤理化性状,增强土壤保水、保肥、供肥的能力,缓解长期施用化肥造成的土壤酸化、板结。
 
  (2)模式流程:
 
  收集秸秆→粉碎→原料组织→进料→辅料添加及调节C/N、含水量等→搅拌均匀→堆放发酵与定期翻堆→腐熟完成→添加功能微生物→二次发酵→质量检测→造粒→成品装袋→成品入库。
 
  (3)模式特点:
 
  利用农作物秸秆、畜禽粪便和微生物菌种,生产有机肥实现了“秸秆-离田-有机肥-还田”循环利用模式;通过推广秸秆有机肥生产技术,既可使秸秆废弃物得到无害化处理,又可以通过生物有机肥增产增效,实现生态效益和经济效益的有机结合;秸秆与农业有机废弃物的资源化循环利用是农业绿色发展的重要基础。
 
  三、秸秆饲料化模式
 
  1、头饲再食型饲粮两用水稻秸秆全量利用模式
 
  (1)模式内涵:
 
  再生稻作为“一种两收”的生产方式,再生季成本低,管理简单,是一种高效高产轻省的周年水稻生产方式;青贮、黄贮技术是分别将水分含量较高的全株(65%左右)和秸秆原料(50%左右)通过添加适量的水分(控制在65%~70%)和复合菌剂,在厌氧条件下,使原料纤维素、半纤维素及一些木质素降解转化为易发酵的糖类,而糖类经有机酸发酵转化为乳酸和挥发性脂肪酸,提高秸秆的营养价值。再生稻头季由于高温灌浆,稻谷做口粮时碾米品质、外观品种和食味品质较差,因此,将再生稻头季刈割全株做青贮,再生季收获稻谷后的秸秆作黄贮,不仅使再生季的产量米质大幅提升,而且又能将秸秆进行全量离田处理,通过草食动物过腹还田。青贮和黄贮后的秸秆饲料可以周年或跨年储存。以再生稻秸秆饲料为基础日粮饲喂牛、羊,通过补充适宜比例的蛋白质饲料和部分青绿饲料,可以产生正的饲料组合效应。牛、羊饲养试验表明,再生稻头季全株青贮料适口性好,饲喂效果大幅优于干稻草,与全株青贮玉米相当。
 
  (2)模式流程:
 
  首先通过栽培技术进行定向栽培管理,为形成再生稻头季饲料化利用提供原料基础;头季全株经过适时刈割、砸短、添加菌种密封发酵,形成品质较佳的青贮发酵饲料;头季全株也可以经过适时刈割、烘干、粉碎,添加能量、蛋白和微量元素经过配方调制制粒,形成全价颗粒饲料。再生季水稻收获后,秸秆立即捡拾打捆,装袋或裹包黄贮,形成黄贮饲料。饲食两用型再生稻秸秆全量利用的基本流程是:
 
  水稻定向栽培→头季适时刈割→全株青贮或制粒→再生季完熟收获→秸秆黄贮或制粒。
 
  (3)主要优点:
 
  该模式能保障草食动物粗饲料安全、稳定粗饲料供应,提供的水稻青贮、黄贮,养殖户可与种植户直接订单对接,减少中间环节,既提高水稻秸秆利用价值,又降低草食动物粗饲料成本;通过定向栽培,再生稻头季鲜草产量可达2.5吨/亩,再生季稻米产量可达450kg以上,与现有再生稻种植模式相比,显著提高经济效益;模式可以实现农业资源利用节约化、农业投入减量化、生产过程清洁化,一田两用,粮饲生产协调,助推构建生态循环农业体系,推动资源节约型、环境友好型和生态保育型农业发展,提升农业可持续发展水平、标准化生产水平和农产品质量安全水平。
 
  2、秸秆青/黄贮饲料化模式
 
  (1)模式内涵:
 
  农作物秸秆含有丰富的营养和可利用的化学成分,通过物理、化学、生物等处理方法,添加辅料和营养元素,可以制成营养齐全、适口性好的牲畜饲料。秸秆青(黄)贮是在适宜的条件下,通过有益厌氧菌如乳酸菌等大量繁殖抑制腐败菌等微生物活动,从而达到抑制和杀死多种有害微生物保存饲料的目的。
 
  (2)模式流程:
 
  第一步,将收集的农作物秸秆通过揉丝机进行柔丝破碎,混匀,经进料斗至输送体输送到打包机罐体内;第二步,物料全部进入罐体后通过打包机和生物膜进行打包,以便储存;经过微生物发酵作用,达到长期保存其营养成分的一种处理技术方法。
 
  (3)主要优点:
 
  秸秆通过青(黄)贮、压块、膨化等方式加工成牲畜饲料,提高了秸秆饲料转化效率,拓展了饲料来源,节约了饲料用量,有效缓解粮食供需矛盾;通过秸秆饲料化利用,缓解了禁烧压力,保护了农业生态环境,又大幅降低了饲料企业原料成本,进而减少农村养殖业成本,增收节支,促进农业产业生态链良性发展,逐步实现“精料型”畜牧业向“节粮型”畜牧业结构转变。按现有的饲养饲料成本计算,秸秆饲料可以创造3倍左右的经济利益,可实现农户、饲料生产企业与养殖大户的多方共赢。
 
  四、秸秆基料化模式
 
  1、大球盖菇秸秆利用模式
 
  (1)模式内涵:
 
  通过开沟等方式将秸秆放置于沟中,接种大球盖菇菌种后再覆土,采收大球盖菇。利用植物秸秆(壳)为原料,可在大田、林地或大棚能进行间作套种、温室大棚反季栽培;同时可在不加麦麸等辅料的条件下即可栽培正常出菇。大球盖菇种植技术简单,种植原料丰富,适应性广,投入低,产值高,劳动量小,经济效益相比其它种植业优势明显;还能充分利用农闲水田与冬季农闲劳动力,是一种操作方便的秸秆综合利用模式。
 
  (2)模式流程:
 
  主要包括菌种培养、菌床制作、接种菌剂、采收等环节。食用菌菌种筛选→菌种制备→栽培袋制作→子实体栽培→温度调节、光诱导、CO2浓度控制、辅助技术→产品采后处理。
 
  (3)主要优点:
 
  消除稻草焚烧带来的环境污染,提高了水田肥份,促进次年水稻产量提高;对农村调整产业结构,农户增产增收,具有良好经济效益、环保效益与社会效益。
 
  在栽培时间适宜、培养料配方适宜和管理得当的情况下亩产一般1500~2000kg,保护地栽培亩产一般可以达到2000~2500kg。当前,鲜菇市场售价为20~30元/kg、春季鲜菇市场售价约为10元/kg,经济效益可观。
 
  2、秸秆生产草菇、长根菇利用模式
 
  (1)模式内涵:
 
  将收集的水稻秸秆经过粉碎、浸泡、除水、发酵、杀菌等物理化学过程加工成栽培基质,接种草菇。
 
  (2)模式流程:
 
  水稻秸秆切成短段或碎屑,用1-3%的石灰水浸泡12h左右,堆积24h,湿料含水量为70-75%,多余水份滤除或压榨去除。将湿料拌入辅料后堆积盖膜,进行好气性发酵,待堆温升至60℃时,保持0.5d后翻堆。堆温再次上升至60℃时保持6d后散堆。堆料送往栽培室或菇场使用时,采用高温杀菌(70℃以上高温密闭8h)后通风再行草菇接种。
 
  原料准备→料预处理→混料→发酵→铺料→巴氏消毒→接种→发菌管理→出菇管理→清房。
 
  (3)主要优点:
 
  通过秸秆基料化生产出的草菇质优、味鲜,丰富了人们生活食材,提高了企业和菇农经济收益;经济效益可观,正常产量为100㎏稻秸产鲜草菇20㎏,按市价约40元/㎏,每吨秸秆可产出8000元;可按“公司+农户”模式,采取“统一提供菌种、统一生产技术服务、统一订单保回收、统一市场销售”方式带动农户发展草菇产业。
 
  3、果菌套种模式
 
  (1)模式内涵:
 
  主要利用农作物秸秆与木屑、松木屑、甘蔗渣、豆渣等制作黑木耳、松茸、竹荪、灵芝等栽培基质,菌类与蓝莓、树莓、葡萄等名优水果套种,蓝莓、树莓、葡萄为菌类生长提供了舒适的自然生长环境,菌类生长采收后的基料蓝莓、树莓、葡萄的生长增加了优质有机肥料,同时果木林地15~20㎝厚的基料垫层有效抑制了杂草生长。
 
  (2)模式流程:
 
  原料准备→料预处理→混料→发酵→巴氏消毒→铺料→接种→发菌管理→出菇管理。
 
  (3)主要优点:
 
  促进循环农业的发展,为秸秆综合利用,点废成金提供了有效示范;秸秆制作菌类栽培基质不仅为菌类提供了良好的生长环境,为果类生长提供了良好的有机肥料,15~20cm厚的基料也能有效抑制杂草的生长;经济效益可观,鲜木耳、县灵芝、松茸以及竹荪等市场价格较高,利润可观。
 
  五、秸秆制作燃料颗粒能源化模式
 
  (1)模式内涵:
 
  秸秆生物燃料颗粒主要是以作物以及废弃物为原料供热,代替有限资源石油、天然气、煤炭等燃烧,以起到绿色环保等目的。在当前国家环保要求小型锅炉禁止燃煤的情况下,秸秆制作燃料颗粒能源化完全可以替代燃煤,一方面绿色环保,同时也使秸秆得以综合利用。
 
  (2)模式流程:
 
  秸秆经过初步烘干(秸秆湿度大于20%时需要)→破碎→粉碎→颗粒挤压成型(制粒)→成品(冷却)。秸秆的能源化利用,秸秆造粒要求原料的水分在20%以下,如果水分过高需要烘干,然后经过破碎、粉碎、成型,可根据客户的需要制造*燃烧热量的生物质颗粒。
 
  (3)主要优势
 
  避免了秸秆露天集中焚烧,遏止了大气、水环境的继续污染;秸秆生产生物燃料颗粒可替代燃煤实现能源利用方式转变,具有较好的经济效益和产业化前景。
 
  六、秸秆原料化模式
 
  1、秸秆加工优质生态板材技术
 
  (1)模式内涵:
 
  以农作物秸秆为主要原料生产生态人造板,加工性能优于刨花板,产品色泽自然亮丽、密度均匀,可与木质板相媲美,这是中密度纤维板、刨花板无法实现的。生产采用MDI胶粘剂,不含甲醛,防水性能好,吸水膨胀率低,胶粘剂用量仅3-5%,无需添加防水剂,从而大大降低了产品的生产成本,完全符合绿色环保要求,广泛用于建筑、装潢、家具、工艺品、家电外壳等,相对其他板材优势明显,市场竞争力强。秸秆通过双通道芯表层干燥系统,在秸秆回收到工厂之后,通过原材料检查、切断、粉碎、筛选、打磨、拌无醛胶等工艺后,直接进到预压机进行预压,再进到核心压机,通过高温高压的过程,终形成真正无醛环保的生态板材。
 
  (2)模式流程:
 
  稻草秸秆→干燥粉碎→筛选→拌胶→芯层铺装→预压→热压→凉板→养生→砂光→锯切→包装→出库
 
  (3)主要优点:
 
  低碳环保产品使用秸秆纤维替代普通木纤维,具有双重低碳减排效应;每制造1立方米生态秸秆板,需使用1.2吨秸秆,可减少的碳排放为2.52吨,其次间接减少森林砍伐,每生产1立方米秸秆板减少树木砍伐、保护森林产生的碳减排达到5.49吨,有效减少秸秆焚烧带来的雾霾等影响,减少木材消耗量,保护青山绿水的优美环境。
 
  2、秸秆制作花炮基座生产模式
 
  (1)模式内涵:
 
  传统花炮基座主要是以废纸加工而成,本模式将作物(水稻)秸秆通过捡拾打捆机收集移出稻田,经烘干,再粉碎成10毫米左右的稻草纤维,然后再按一定比例加入粘合剂、阻燃剂及其他配料,以机械搅拌、挤压成型、恒温固化,后通压包成型制成花炮底座,入库、销售,既提高了秸秆的附加值,也解决了花炮企业的原料问题。
 
  (2)模式流程:
 
  稻草秸秆收集→前处理→粉碎→加入粘合剂混合→铺装→热压成型→冷却脱模→检查→入库。
 
  (3)主要优点:
 
  通过秸秆综合利用与地方产业的有机结合,增加了就业,提高了秸秆的价值及利润;农民将废弃在田间的秸秆收集后送至利用企业可增加收入;利用秸秆替代废纸,作为烟花底座原料,可降低烟花底座生产企业的原料成本,同时减少造纸带来的污染;应用秸秆替代废纸,可减少森林的砍伐,增加绿色覆盖面积,减少水土流失。
 
  3、秸秆制作防滑草支垫
 
  (1)模式内涵:
 
  秸秆经过初步分拣、梳理、压缩等过程,在压缩以后用铁丝进行捆扎,终形成防滑性较强的适合钢铁厂使用的防滑草支垫。使用稻草的整草,从根本上了减少了秸秆留田。将原来的“农业废弃物”变废为宝,产生较高的经济价值,农业合作社和农民增收,有利于促进农业循环经济发展,促进农户秸秆收集积极性和效益。
 
  (2)模式流程:
 
  第一步,收集整草,一般长度为80~100左右厘米为宜;第二步,把收集的稻草梳理;第三步,梳理后的稻草使用压缩机进行压缩,压力在70吨左右,把稻草物理加工,压缩成1.5米长宽0.16米,厚0.15米的草支垫,秸秆加工草支垫完成。
 
  (3)主要优点:
 
  秸秆加工制成的草支垫主要作为防滑材料大量应用于钢铁生产企业,是装载钢坯、板坯、卷钢、管材、水泥轨枕、电杆、建筑水泥构件、石料等各种型材及大件货物加固的防滑衬垫,其生产方式投资小、占地面积小,操作简便,且能带来较好的经济效益。目前草支垫价格在5-6元/条。
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