Enhancing crop growth, nutrients availability, economics and beneficial rhizosphere microflora through organic and biofertilizers
Enhancing crop growth, nutrients availability, economics and beneficial rhizosphere microflora through organic and biofertilizers
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DOI：
10.1007/bf03175204
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发表时间：
2007-01-01
影响因子：
3
通讯作者：
Chaudhry, Abid G.
中科院分区：
文献类型：
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作者：
Jilani, Ghulam;Akram, Abida;Chaudhry, Abid G.
通过田间试验，探讨了化学肥料、有机肥料和生物肥料配合施用对饲用玉米的增产潜力、根际有益微生物群落和经济效益。采用NPK肥料与半量NP、生物钾肥（BPF）、Biopower、有效微生物菌剂（EM）、绿色堆肥（GFC）等有机肥和生物肥不同组合的处理，对NPK肥料进行比较。全氮磷钾处理在株高、叶面积和鲜生物量等方面的生长量最大，其次是BPF+全氮磷处理。作物对NPK养分的最高吸收量为：半NP+Biopower下的N; BPF+全NP下的P;全NPK下的K。根际微生物区系计数结果表明，Biopower+EM沿着施用半量GFC土壤改良剂（SC）或NP肥时，固氮菌（Azotobacter）、固氮菌（Azoacillum）、固氮环菌（Azoarcus）和动胶菌（Zoogloea）数量最高。对于解磷细菌，芽孢杆菌在Biopower+BPF+半NP处理下数量最多，假单胞菌在Biopower+EM+半NP处理下数量最多。得出的结论是，半剂量的NP肥与Biopower+BPF / EM的整合可以得到与全剂量的NP肥相似的作物产量;并且通过减少肥料的使用，生产成本最小化，净收益最大化。然而，半剂量的NP肥料与生物肥料和堆肥的整合并没有给玉米饲料生长和产量与全剂量的NPK肥料相当。
Field experiment was conducted on fodder maize to explore the potential of integrated use of chemical, organic and biofertilizers for improving maize growth, beneficial microflora in the rhizosphere and the economic returns. The treatments were designed to make comparison of NPK fertilizer with different combinations of half dose of NP with organic and biofertilizers viz. biological potassium fertilizer (BPF), Biopower, effective microorganisms (EM) and green force compost (GFC). Data reflected maximum crop growth in terms of plant height, leaf area and fresh biomass with the treatment of full NPK; and it was followed by BPF+full NP. The highest uptake of NPK nutrients by crop was recorded as: N under half NP+Biopower; P in BPF+full NP; and K from full NPK. The rhizosphere microflora enumeration revealed that Biopower+EM applied along with half dose of GFC soil conditioner (SC) or NP fertilizer gave the highest count of N-fixing bacteria (Azotobacter, Azospirillum, Azoarcus and Zoogloea). Regarding the P-solubilizing bacteria, Bacillus was having maximum population with Biopower+BPF+half NP, and Pseudomonas under Biopower+EM+half NP treatment. It was concluded that integration of half dose of NP fertilizer with Biopower+BPF / EM can give similar crop yield as with full rate of NP fertilizer; and through reduced use of fertilizers the production cost is minimized and the net return maximized. However, the integration of half dose of NP fertilizer with biofertilizers and compost did not give maize fodder growth and yield comparable to that from full dose of NPK fertilizers.