烟草还田配施石灰对土壤养分和水稻产量的影响.docx
《烟草还田配施石灰对土壤养分和水稻产量的影响.docx》由会员分享,可在线阅读,更多相关《烟草还田配施石灰对土壤养分和水稻产量的影响.docx(18页珍藏版)》请在第一文库网上搜索。
1、研究烟-稻轮作区烟杆还田配施石灰对土壤养分和水稻产量的影响,可为烟杆高效利用和烤烟收货结束以后节省换茬时间提供参考依据。于2014-2018年在安徽省烟-稻轮作区布置盆栽和大田试验,比较烟杆不还田(CK)、烟杆还田(SR)、烟杆还田+白云石粉(SR+DP)、烟杆还田+生石灰(SR+L)等处理烟稻轮作区土壤pH、水稻产量的差异。水稻产量SR+L (烟杆还田配施生石灰)SR (常规还田)SR+D (烟杆还田配施白云石粉)CK(烟杆不还田)处理的趋势。SR+D对提高土壤pH的作用最为显著,从对照的6.0上升到6.6; SR+DP和SR+L水稻产量分别提高15%和24%。SR+D对土壤中有机质含量提升
2、最高,与对照相比提高了 L6g/kgSR+D和SR+L对速效磷提升明显与对照相比提高了 35%和37%。SR+L对土壤中速效钾的含量提升明显,与对照相比提升了 39%,而碱解氮含量,四个处理并没有明显影响。施用石灰能有效提高烟-稻轮作区酸性土壤pH,烟杆还田速效钾和速效磷含量明显提高,并对提高水稻产量有积极作用。关键词:烟杆还田;石灰;土壤养分;水稻;烟-稻轮作AbstractThe objective of this study was to understand the effect of tobacco straw returning andliming on yield, qualit
3、y, and chemical characteristics of flue-cured tobacco, and to provide ahigh-efficiency technical for tobacco straw utilization and soil amelioration in tobacco-ricerotation areas. A pot experiment was carried out in 2014, and a field experiment from 2014 to2016 was conducted with four treatments (wi
4、thout tobacco straw return, CK; tobacco strawreturn, SR; tobacco straw return with dolomite powder, SR+DP; and tobacco straw return withlime, Sr+L) to investage the soil pH, quality and chemical characteristics of flue-cured tobaccoleaves. Results showed that the decomposition rate and nutrient rele
5、ase of tobacco straw werefast at the beginning and then slowly decreased with the decomposing process. The release ratesof the nutrients followed an order of K P N, for 99%, 89% and 80%, respectively. The mostsignificant effect for increasing soil pH was SR+L treatment, which increased soil pH from
6、5.6 to6.0 compared with the CK. SR+DP and SR+L treatment increased the yield of tobacco leaves by6% and 8%. Moreover, SR+L treatment increased the appearance quality and smoking quality ofthe cured leaves by 10% and 16%. The K content of C3F cured leaves was increased from 14.4to 18.8 g kg_1 (increa
7、se 31%) for SR, SR+L and SR+DP, compared with the CK, and the K+content of B2F increased by 14%-23%.Liming can effectively improve the pH of acid soil intobacco-rice rotation, the potassium in tobacco straw can be released effectively, which haspositive effect on improving potassium content of tobac
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 烟草 还田 石灰 土壤 养分 水稻 产量 影响
