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绿色种养循环农业粪肥施用技术意见

2022-10-27 09:40:50 来源:江苏省农机推广站 阅读量:14569 评论

导读:徐州市制定绿色种养循环农业试点粪肥施用技术意见,供广大农户和基层农技人员参考。

  【农机网 热点关注】为科学、合理、有效地施用粪肥,加快绿色种养循环农业试点项目顺利实施,减少农业面源污染,实现化肥减量增效,助推农业绿色发展、高质量发展,徐州市制定绿色种养循环农业试点粪肥施用技术意见,供广大农户和基层农技人员参考。
 
  一、沼液的施用
 
  沼肥不是污水,它是畜禽粪尿等有机物料经厌氧发酵的一种产物(沼液),一种缓速兼优高效的有机肥料,可增强作物抗旱、防冻能力,提高秧苗的成活率,减少病虫害发生,生产绿色食品。由于人畜粪便及秸秆经过密闭发酵后,在产生沼气的同时,还产生一定量的沼肥,施用沼肥不但节省化肥施用量,也有利于生产绿色食品。
 
  1、施用作物:小麦、水稻、玉米、蔬菜、果树等都可以施用。
 
  2、施用时期:小麦在进入三叶期到拔节期之前;水稻在插秧活棵至破口期;玉米3叶期到抽雄前;蔬菜要看是叶菜类还是茄果类,叶菜类蔬菜三叶期后到采收前都可以施用,茄果类蔬菜定植活棵后至开花前都可以施用,开花后不建议施用沼液;果树从10月中下旬到来年开花前都可以施用。若作旱茬小麦基肥使用,可在耕地前将沼肥泼浇于地表,3-4天后再撒施化肥(根据沼肥用量可减施化肥40-50%)耕翻整地播种。
 
  3、施肥方式:小麦、玉米采用泼浇或漫灌;水稻插秧前采用先漫灌后整地,插秧后采用沟渠灌溉施用;蔬菜采用泼浇或沟灌施用;果树采用穴施或沟施,蔬菜果树有水肥一体化设备的,可以结合灌水进行滴管施用,施用时注意过滤,避免堵塞管道和滴头。沼液施用应根据养分含量和作物特点适当稀释1-3倍。
 
  4、施用量:粮食作物建议亩用量3-4方,经济作物亩用量5-6方。施用时采用少量多次,根据土壤肥力水平情况酌情增减,同时底肥氮肥的用量适当降低。
 
  5、注意事项
 
  (1)出池后不能立即施用。沼肥的还原性强,出池后的沼肥立即施用,它会与作物争夺土壤中的氧气,影响种子发芽和根系发育,导致作物叶片发黄、凋萎,尤其是小苗庄家。因此,沼肥出池后,一般先在储粪池中存放5-7天后施用;沼渣与磷肥按10:1的比例混合堆沤5-7天后施用,效果更佳。
 
  (2)不兑水沼肥不能直接追施在作物上,尤其是用来追施幼苗,会使作物出现灼伤现象。沼肥作追肥时,要先兑水,一般兑水量为沼液的1—3倍。
 
  (3)不提倡表土撒施沼肥施于旱地作物。宜采用穴施、沟施,然后盖土。施用于水田应在耖坯前均匀撒施田面,然后犁翻入底层。
 
  (4)不能过量施用沼肥。沼肥施用一般要比施用普通猪粪肥少。若盲目大量施用,会导致作物徒长,行间荫蔽,造成减产。
 
  (5)不能与草木灰、石灰等碱性肥料混施。草木灰、石灰等碱性较强,与沼肥混合,会造成氮肥的损失,降低肥效。
 
  (6)沼液要充分腐熟后才能施用。尤其在单集和大许等地,牧原养殖场产生的沼液中除了含有作物需要的养分外,还有圈舍处理的消毒剂等,要通过腐熟和降解后才能施用到大田中去。
 
  二、粪肥的施用
 
  以畜禽粪便、农作物秸秆、尾菜尾渣等农业有机废弃物为原料,进行堆沤,堆肥中期高温并持续,温度较低区域适当延长维持时间,实现充分腐熟。 注意控制含水量为45%~65%,碳氮比为20:1~40:1,pH为5.5~9.0,有机物料腐熟剂接种量宜为堆肥物料质量的0.1%~0.2%。符合《畜禽粪便堆肥技术规范》(NY/T 3442-2019)要求,生产的粪肥能够提高土壤中的有机质含量,改良土壤,促进土壤团粒结构的形成。
 
  1、施用作物:适宜于小麦、水稻、玉米、蔬菜、果树等所有农作物施用,起到改良土壤、培肥地力、提高化肥利用率。
 
  2、施用时期:一般作为基肥施用,对于茬口多、周年轮作的,尽量安排在生育期长的作物上作基肥施用;宜在秋季或播种(移栽)前做基肥施用,施用时避开雨季,施入后应在24小时内翻耕入土。
 
  3、施肥方式:机械撒施、条施、沟施等方式作为基肥,也可以作为追肥。
 
  4、施用量:大田作物每亩粪肥的施用量达到2-3方为宜,粮食作物用量适当减少。
 
  5、注意事项:
 
  (1)粪肥的沤制生产要严格执行《畜禽粪便堆肥技术规范》(NY/T 3442-2019)的标准。
 
  (2)施用的粪肥要充分腐熟发酵。未完全腐熟发酵的粪肥施入土壤中,随着降雨,会使未完全腐熟的粪肥逐渐腐熟,并放出一定的热量,从而导致小苗庄家烧根或烧苗。同时,粪便含有多种病菌和虫卵,粪肥施用后,由于未完全腐熟,可能会造成病害、虫害草害增加。粪肥完全腐熟是第一位的要求,未经腐熟的粪肥养分有效性低,达不到追肥的目的,反而会出现伤根、熏棚等问题。
 
  (3)粪肥施用要适宜。大田作物每亩粪肥的施用量达到2-3方为宜,若大量提高粪肥施用量,则可造成田地养分蓄积和水体污染,由于粪肥富含有机氮,其分解的最终产物也是硝酸盐,同样会对水体和环境产生污染,粪肥还可能有重金属超标等问题。
 
  (4)不要与碱性肥料或杀菌剂同时施用。
 
  三、商品有机肥的施用
 
  有机类商品肥料是以植物源和畜禽粪便为原料加工生产的商品有机肥料、生物有机肥、复合微生物肥料、有机-无机复混肥料以及腐殖酸类肥料等。有机类商品肥料应原料来源清楚、发酵腐熟完全,其中,有机肥料质量应符合《有机肥料》(NY/T 525-2021)要求。 施用商品有机肥,不仅能为农作物提供全面营养,而且肥效长,可增加和更新土壤有机质,减少养分固定,提高化肥肥效,增强土壤的保肥性能和缓冲作用,促进微生物繁殖,改善土壤的理化性质和生物活性,减轻土壤污染,是绿色食品生产的主要养分。
 
  1、施用作物:适宜于粮食作物和经济作物等所有农作物施用,起到新土壤有机质,促进微生物繁殖,改善土壤的理化性质和生物活性,提高化肥利用率。
 
  2、施用时期:与粪肥施用大致相同,以作为基肥为主。
 
  3、施肥方式: 可采用穴施、沟施、环状施肥等方式集中施用,在两行作物中间沟施或株间穴施。作种肥时采用条施、点施和穴施等方式,可与化肥混合,随机械播种施入土壤,
 
  4、施用量:亩用量一般为200—800公斤,粮食作物用量少些,经济作物用量多些,注意与化肥配合施用。
 
  5、注意事项:
 
  (1)商品有机肥的生产符合《有机肥料》(NY/T 525-2021)要求。
 
  (2)施用的粪肥要充分腐熟发酵。若施入未充分腐熟的商品有机肥,在土壤中进行二次发酵,造成烧种、烧苗现象。
 
  (3)商品有机肥的长效性不能代替化学肥料的速效性,必须根据不同作物和土壤,再配合尿素、配方肥等施用,才能取得最佳效果。
 
  (4)施用商品有机肥时,要与植株根系保持一定距离,避免与碱性肥料或杀菌剂同时施用。
 
  (5)要注意商品有机肥的酸碱度(pH值),在不同土壤环境下应注意其适应性和施用量。
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