| 1. | Method for the determination of available phosphorus in calcarcous soil
石灰性土壤有效磷测定方法 |
| 2. | Mineralization and nitrification of soil ni trogen in calcareous soil profile
石灰性土壤剖面氮素的矿化和硝化作用 |
| 3. | Effects of pig slurry and phosphatic fertilizer on organic - p fractions and their availabilities
猪粪和磷肥对石灰性土壤有机磷组分及有效性的影响 |
| 4. | P . the activity of neutral phosphatase was stronger than the alkaline phosphatase in the tested calcareous soils
在供试的石灰性土壤中以中性磷酸酶活性最高。 |
| 5. | The phosphorus activation coefficient ( pac ) was generally lower in different soil layers and at different fertility levels in calcareous soils
石灰性土壤中磷素活化系数pac在不同肥力土壤和不同土层中普遍较低。 |
| 6. | Because of alkaline calcareous nature of soils , availability of micronutrient is a problem , particularly zn in rice soils , cu and zn in citrus and fe in apples
因碱性石灰性土壤的特性，微量养分有效性不高，特别是水稻土中缺锌，柑桔园中缺铜缺锌和苹果园中缺铁。 |
| 7. | The area of mn - deficiency soil is large in china . mn - deficiency in agricultural crops , especially in wheat plants , is secondly to fe - deficiency in calcareous soils of the world
中国缺锰土壤面积很大，作物缺锰特别是麦类作物缺锰在全球石灰性土壤上仅次于缺铁。 |
| 8. | Then by methods of fractionation of inorganic and organic p in soils and multivariate statistical analysis , this paper discussed phosphorus fractions in soils with three fertility levels and in different soil layers . the affecting factors on fast - available p ( avail . p ) were also related
在此基础上，用无机磷分级和有机磷分组方法、多元统计分析的方法，研究了石灰性土壤不同肥力与不同土层中磷素的各种形态含量差异以及影响速效磷的因素，结果如下： 1 |
| 9. | In order to know about the utilization condition of nitrogen in wheat and rice when fertilize the new long - effect urea that process by humic acid material being used as depressor , the paper study the influence and the best proportion in lime soil that fertilize the new long - effect urea no . 4 to wheat and rice , the result indicate that jointed period is the key period that gramineous crop release the nitrogen
摘要为了了解施用新型长效尿素时，小麦、谷子氮素的利用状况，通过对冬小麦、春谷子的盆栽试验，研究了在石灰性土壤中，以腐植酸类物质为抑制剂加工而成的长效尿素四号，对小麦、谷子的氮素利用状况的影响以及最佳配比。 |
