The results indicated that mineral element contents of pear fruits such as Ca,Fe,Cr are rich,the contents of TTS and polyphenolic materials are richer,and Vitamin C is lower.
结果表明 ,2种野生砂梨果实都富含矿质元素 ,尤以Ca ,Fe ,Cr最为丰富 ,含有较多的TTS和多酚类物质 ,Vc含量相对较低 。
This paper present a comparison experiment on dense-graded AK-13A asphalt mixture mixed with mineral fiber.
进行密级配AK-13A沥青混合料掺矿质纤维的对比试验,并通过其在粤赣高速公路中的应用,总结掺矿质纤维对AK-13A沥青混合料性能的影响。
Spatial variability of soil mineral nitrogen of farmlands in different regions of Ningxia;
宁夏不同地区农田土壤矿质氮的空间变异特征
The content of soil microbial biomass nitrogen(B_N) and its affecting factors were reviewed,the important roles of soil microbial biomass nitrogen in soil nitrogen cycling were described,and the relationships of soil microbial biomass nitrogen with soil mineralizable nitrogen,mineral nitrogen,organic nitrogen and fixed ammonium were emphatically discussed in this paper.
简述了土壤微生物生物量氮的含量及其影响因素,阐述了其在土壤氮素循环中的重要作用,着重讨论了其与可矿化氮、矿质氮、有机氮和固定态铵之间的关系,指出土壤微生物生物量氮与供氮因子间的关系在氮素循环研究中有非常重要的作用,可为调控土壤氮素的供应状况,减少氮素损失,提高氮肥利用率提供科学依据,并提出了需要深入研究的问题。
In order to provide a theoretical basis for rice cultivation mode in aerobic soil condition, a field experiment was conducted in Yancheng Academy of Agriculture Science, Jiangsu province from 2005 to 2006 and such parameters were determined as plant biological traits, nitrogen use efficiency differences, mineral nitrogen dynamic changes.
本试验通过在江苏省盐城市农科院试验场2005年和2006年两年的田间试验，研究了常规淹水栽培、覆盖薄膜旱作栽培、覆盖秸秆旱作栽培和裸地旱作等不同栽培方式下，稻麦轮作系统中作物生物学特征，氮肥利用率差异，土壤矿质氮动态变化，旨在阐明水稻栽培方式对稻麦轮作系统中土壤供氮特征及其对作物的生长影响机制，为提高氮肥利用效率和增加土壤肥力提供解决方法，并为水稻旱作进一步推广提供理论依据。