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首页> 外文期刊>Asia-Pacific Journal of Science and Technology >Decomposition, nitrogen release and soil fertility of plant residues incorporation from different pre- sugarcane planting management
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Decomposition, nitrogen release and soil fertility of plant residues incorporation from different pre- sugarcane planting management

机译：不同前甘蔗种植方式对植物残体的分解，氮释放和土壤肥力的影响

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The effect of decomposition, nitrogen release and soil fertility of upland rice-legume residues incorporation before sugarcane planting was investigated. The experimental design was randomized complete block design (RCBD) with 4 replications. The following residue and control treatments were implemented: i.e. i) control; no residues incorporation, ii) weed, iii) soybean (Glycine max), iv) sunn hemp (Crotalaria juncea) and v) upland rice. Soil samples and litter bags were collected at 1, 2, 4, 8, 12, 16, 24 and 32 weeks after incorporation. Soil mineral N was analyzed by Flow Injection Analyzer (FIA) and remaining dry weights of litter bag were recorded. Soil microbial biomass was measured by chloroform fumigation extraction method. The results revealed that weed residues treatment had the highest of remaining dry weight and % N remaining in litter bag in most sampling dates. Sunn hemp residues treatment had the highest soil mineral N and was significantly different from the other treatments (p < 0.01) at 4, 8, 12 and 16 weeks after residues incorporation. At final sampling date, the upland rice residues treatment gave the highest microbial biomass N and was significantly different from the other treatments (p < 0.01) and provided the highest relative microbial biomass N but not significantly different from soybean residues treatment. Moreover, soil organic matter could be improved by all residue treatments. However, sunn hemp may be a potential crop for soil N release but upland rice could support rice consumption demand. Thus, the effect of legume-upland rice residue incorporation on sugarcane yield should be further investigated under field conditions.
机译：研究了甘蔗种植前陆稻-豆科植物残体的分解，氮释放和土壤肥力的影响。实验设计是具有4个重复的随机完整区组设计（RCBD）。实施了以下残留物和对照处理：即i）对照;没有残留，ii）杂草，iii）大豆（Glycine max），iv）麻（Crotalaria juncea）和v）陆稻。结合后1、2、4、8、12、16、24和32周收集土壤样品和垃圾袋。用流动注射分析仪（FIA）分析土壤矿质氮，并记录垃圾袋的剩余干重。用氯仿熏蒸法测定土壤微生物量。结果表明，在大多数采样日期中，杂草残留物处理的垃圾袋中残留干重和残留氮含量最高。 n麻残留处理的土壤矿质氮含量最高，并且在残留处理后第4、8、12和16周与其他处理存在显着差异（p <0.01）。在最后抽样日期，旱稻残渣处理提供了最高的微生物生物量氮，与其他处理有显着差异（p <0.01），并且提供了相对最高的微生物量氮，但与大豆残渣处理没有显着差异。此外，所有残留物处理均可改善土壤有机质。然而，sun麻可能是释放土壤氮的潜在作物，但旱稻可以满足稻米需求。因此，应在田间条件下进一步研究豆科植物旱稻残留物掺入对甘蔗产量的影响。

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