• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Turkish Journal of Agriculture & Forestry >Organic materials: sources of nitrogen in the organic production of lettuce
【24h】

Organic materials: sources of nitrogen in the organic production of lettuce

机译：有机材料：生菜有机生产中的氮源

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents the results of 2 experiments: an incubation experiment and a subsequent field experiment. An incubation experiment was set up in order to determine the mineralization potential of different organic materials (OMs) (well-rotted farmyard manure [FTM], guano [G], soybean seed [S], and forage pea seed [P]), the kinetics of mineral nitrogen (N) release, and the correlation between OM content and the quantity of mineralized N. The results of the incubation experiment were checked underfield conditions in which different OMs were used as N sources for lettuce (Lactuca sativa L.). The highest mineralization rate constant k (0.127 day~(-1)) and net mineralization rate (NM) (76.37% of total applied N) were obtained with G, and the lowestk (0.098 day~(-1)) and NM (30.12% of total applied N) were obtained with FYM. In the field experiment in 2007 and 2008 we applied different OM sources that contained the same amount of potentially mineralizable N (40 and 35 kg N ha~(-1), respectively), calculated on the basis of k and NM. The use of OMs increased the concentration of mineral N in the soil and increased the yield of fresh lettuce. Nitrate content in the fresh lettuce was within acceptable limits both years (<2500 mg kg~(-1)). Total N inthe above-ground parts of lettuce ranged from 44.38 kg N ha~(-1) (0, treatment without fertilization) to 67.45 kg N ha~(-1) (S) (2-year average). The results show that when determining the quantity of OM to apply it is necessary to take into account thequantity of potentially mineralizable N in order for the plants to use N as efficiently as possible, to regulate the nitrate content in fresh lettuce, and to control the quantity of residual mineral N in the soil at the end of the vegetation period.
机译：本文介绍了两个实验的结果：一个孵化实验和一个随后的野外实验。为了确定不同有机物质（OMs）的矿化潜力，进行了孵化实验（腐烂的农家肥[FTM]，鸟粪[G]，大豆种子[S]和豌豆种子[P]），矿质氮的释放动力学，以及OM含量与矿化N量之间的相关性。在田间条件下检查了温育实验的结果，在该条件下，将不同OM用作莴苣（莴苣）的N源。 。用G可获得最高的矿化速率常数k（0.127 day〜（-1））和净矿化速率（NM）（占施氮总量的76.37％），而最低的k（0.098 day〜（-1））和NM（通过FYM获得了总施用N）的30.12％。在2007年和2008年的野外实验中，我们应用了不同的OM源，这些源包含相同数量的潜在可矿化N（分别为40和35 kg N ha〜（-1）），基于k和NM计算。 OMs的使用增加了土壤中矿质N的浓度，并提高了新鲜生菜的产量。两年来，新鲜生菜中的硝酸盐含量均在可接受的范围内（<2500 mg kg〜（-1））。生菜地上部分的总N介于44.38 kg N ha〜（-1）（S）（67.45 kg N ha〜（-1）（S）（2年平均值）。结果表明，在确定有机肥的施用量时，有必要考虑潜在可矿化氮的数量，以便植物尽可能有效地利用氮，调节新鲜生菜中的硝酸盐含量，并控制生菜中的硝酸盐含量。植被期结束时土壤中残留矿质氮的数量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号