摘要
在冬季覆盖的条件下,研究了雷竹林不同施肥处理对土壤养分平衡和竹笋产量的影响。结果表明:所有施肥处理的雷竹林土壤养分平衡状况均有极大的盈:N的盈余量与输出量之比为1.55~2.70,P的盈余量与P输出量之比为3.49~13.44,K的盈余量与输出量之比为3.5~6.9。高量化肥处理(CF 2.0)的N、P和K盈余量分别达到1187、224.8和847 kg.hm-2,分别比低量化肥处理(CF 1.0)提高了68.1%、76.9%和27.4%。与低量化肥处理(CF 1.0)相比,化肥和猪栏粪处理(CF 1.0+PM 1.0)的N、P和K的养分内部利用效率(INUE)分别提高了30.2%、31.2%和95.0%,竹笋产量提高了2.16倍;半量化肥和猪栏粪处理(CF 0.5+PM 0.5)N、P和K的INUE值分别提高16.6%、15.9%和32.3%,竹笋产量提高了74.2%。对肥力水平高的雷竹林,增施化肥对竹笋产量的提高不显著,但可造成养分的大量盈余,从而导致营养元素的大量流失,并增加环境污染风险,而化肥与有机肥配施,或者减少化肥用量不仅提高了雷竹竹笋产量,而且可以降低养分利用效率,减轻化肥对环境污染压力,促进雷...
Under the condition of winter mulching,effects of different fertilization on soil nutrients balance and bamboo shoot yield of Phyllostachys praecox stands were studied.The results showed that a great amounts of nutrient surplus occurred in the soils of Phyllostachys praecox stands after fertilization and mulching.The ratios of surplus amounts/ output amount of N,P,and K were 1.6~2.7,3.5~13.4,and 3.5~6.9,respectively.The surplus amounts of N,P,and K for the treatment(CF2.0) of chemical fertilizers(CF) with h...
出处
《竹子研究汇刊》
北大核心
2009年第4期11-17,共7页
Journal of Bamboo Research
基金
浙江省科技攻关项目(2003C32029)
关键词
雷竹
集约经营
养分盈余量/养分输出量之比
养分内部利用效率(INUE)
竹笋产量
Phyllostachys praecox
Intensive management
Ratios of NPK surplus amounts/NPK output amount
Internal nutrient use efficiency(INUE)
Bamboo shoot yield