摘要
通过设置在宁夏红寺堡灌区开垦4 a的淡灰钙土上的定位试验,研究了不同施肥对新垦淡灰钙土微生物生物量碳、氮、磷及玉米产量的影响。结果表明:各施肥处理可以明显提高土壤微生物生物量碳、氮、磷含量,不同处理相比,化肥配合羊粪效果最好,单施羊粪次之,单施化肥最低;与对照相比各施肥处理对玉米的增产效果极显著,各处理作用效果的排序为:氮磷+羊粪>氮磷锌钾>氮磷锌>氮磷>氮>羊粪>不施肥,氮磷+羊粪处理与单施氮肥和单施羊粪之间差异达极显著水平。化肥与有机肥羊粪配合施用既能显著增加土壤微生物生物量碳、氮、磷含量又能使玉米产量显著提高,因此是新垦淡灰钙土施肥的最佳选择。土壤微生物量碳与有机碳呈极显著正相关,与全氮呈显著正相关,表明其与土壤肥力关系密切,可作为评价新垦地土壤质量变化的生物学指标。
The effects of different fertilization on soil microbial biomass C, N, P and maize yield in light sierozem were investigated with a field experiment, which was continued for 4 years at Hongsibu irrigated area of Ningxia. The results showed that the fertilization treatments significantly increased the contents of microbial biomass C, N and P compared with control, but there were significant differences among different treatments. The best effect was found in the treatment of chemical fertilizers ＋sheep manure, the second was sheep manure, and the lowest was chemical fertilizers. Fertilization significantly increased maize yield in the following order： NP ＋ sheep manure 〉NPZnK〉NPZn〉NP〉N〉sheep manure〉control. There were significant differences between NP ＋ sheep manure and N or sheep manure. The compound application of chemical fertilizers and sheep manure not only increased the contents of microbial biomass C, N and P but also raised the yield of maize, therefore, it was the best fertilization measure in the newly cultivated light sierozem. Significant positive correlation was found between soil microbial biomass C and organic C as well as total N, so soil microbial biomass C could be regarded as a biological indication to identify the quality change of newly cultivated soil.
出处
《干旱地区农业研究》
CSCD
北大核心
2006年第2期48-51,共4页
Agricultural Research in the Arid Areas
基金
"973"项目(2005CB121102)
教育部博士点基金项目(20040712001)
黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-138)
关键词
祈垦淡灰钙土
微生物生物量碳
氮
磷
施肥
玉米产量
newly cultivated light sierozem
microbial biomass C, N and P, fertilization
yield.
