1) Planting years
种植年限
1.
Characteristics of soil salinity and salt ions distribution in salt-affected field under mulch-drip irrigation in different planting years;
不同种植年限覆膜滴灌盐碱地土壤盐分离子分布特征
2.
Effect of different planting years on the yield of alfalfa and content of N,P,K in soil
种植年限对紫花苜蓿栽培草地草产量及土壤氮、磷、钾含量的影响
3.
Planting years affected the soil heavy metal contents faintly.
选择典型蔬菜种植区,调查并分析了不同蔬菜种类和种植年限对菜田土壤重金属含量的影响。
2) cultivation years
种植年限
1.
Two uplands of different reclamation years(since 1987 and 1993,respectively) were selected in our study to research the effect of cultivation years, precipitation,soil moisture and plant on N2O emission.
以三江平原沼泽湿地不同开垦年限(1987年、1993年开垦)的旱田(种植方式为大豆-冬闲)为研究对象,探讨了种植年限、降雨、土壤湿度以及植物参与对旱田N2O排放的影响。
2.
According to the data of field investigation for tea garden soil in Meng Ding mountain,the soil chemical properties and nitrogen mineralizations were analyzed under different cultivation years and different soil layers,through determination of chemical properties,mineralization-culturing experimentation.
为探讨蒙顶山茶园土壤肥力和供氮能力,本研究以茶园土壤为对象,实地采样,通过土壤基本化学特性测定和矿化培养实验,分析蒙顶山茶园不同种植年限和不同土层土壤的基本化学特性变化及土壤氮素矿化特征,以期为拟定合理的施氮量和提高氮肥的利用率提供科学依据。
3) cropping duration
种植年限
1.
Investigation and determination of several major nutrients in different cropping duration of vegetable,air-opening vegetable and cereal crop soils,chemical characteristic such as pH,organic matter,total,nitrate N,ammonium N,available P,and available K were invested.
选取不同种植年限蔬菜大棚、露天菜地和一般农田,测定了土壤pH值、有机质、全氮、硝态氮、铵态氮、速效P、速效K和阳离子代换量等主要养分。
4) Planting-year
种植年限
1.
The soil organic-mineral complex status and distribution of organic carbon in tea garden of different planting-year were studied.
通过不同种植年限茶园土壤有机无机复合状况以及有机碳的分布变化特征的研究,结果表明,植茶条件下,土壤有机碳含量、重组有机碳含量以及土壤有机无机复合量均高于非茶园对照土壤,并且随着植茶年限的增加而增加。
6) Planting years of rubber trees
植胶年限
补充资料：年限
1.规定的或作为一般标准的年数。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条