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- Drought, salinity, and low temperature are the most severe natural disaster of many abiological adversities.They can make crop yield reduction, even to death. 干旱、盐碱和低温等非生物逆境是危害作物诸多因素中最为严重的自然灾害, 它可以使作物减产, 甚至死亡。
- crop yield reduction 作物减产
- Crop yield correlates closely with annual rainfall. 农作物的收成与年降雨量有密切关系。
- It is found that the accumulative salinity in soil and relative yield reduction for different crop under the condition of leaching treatment are decreased. 结果显示，淋洗灌溉定额条件下，不同作物的土壤盐分积累及作物相对减产率分别比正常灌溉定额条件下有所降低；
- Ways of Improving Crop Yield Per Unit Area and the Countermeasures. 提高作物单产的途径与对策。
- The study of plant nutrition and growth as related to soil condition, especially to determine ways to increase crop yield. 农业生物学; 土壤生物学关于植物养分和与土壤条件相关的生长的研究，尤其是对判定如何增加农作物产量方法的研究
- Blackened circles denote accumulated temperatures and open ones crop yield. 涂黑圆圈表示积温,空白圆圈表示作物产量。
- The crop yields for the year are phenomenal. 当年的庄稼产量是惊人的。
- Gray leaf spot damages leaves at or just after silking stage and causes severe yield reduction. 灰斑病菌在抽丝期期间或结束后损害叶片，导致严重减产。
- Risk evaluation technology of loss(yield reduction rate)caused by disasters, indices and methods taken to reduce risk. 致灾损失(减产率)的风险评估技术,致灾指标的风险评估技术,减灾措施降低灾害风险的评估技术。
- MAYHEW M.STEPHENSON T Biomass yield reduction:Is biochemical manipulation possible without affecting activated sludge process efficiency? 周可新.;许木启
- Effect of long-term single application of chemical fertilizer on soil properties and crop yield. 长期单施化肥对土壤性状及作物产量的影响。
- Effects of rice straw mulch and water-retaining agent on soil properties and crop yield. 施用保水剂和稻草覆盖对作物和土壤的效应。
- N2O is a gas released by ammonium nitrate, which is widely used as a fertilizer to increase crop yield. N2O是由硝酸铵释放出来的气体,硝酸铵是一种广泛使用的化学肥料用于增加农作物的产量。
- Effect of plastic film mulching on crop yield and nitrogen efficiency in semiarid areas. 半干旱地区地膜覆盖对作物产量和氮效率的影响。
- Ex perimental results also indicated that sprinkler uniformity had little effect on crop yield for the studied range of CU. 试验结果还表明，在所研究的喷灌均匀系数范围内，均匀系数对产量的影响不明显。
- Vegetation Indies (VI) have been used to estimate crop yield and monitor crop growth for many years. 地表具有各项异性的特征，在监测地表植被时，经过大气纠正的数据，通过多时相和多角度合成时对于它的二向反射率必须经过角度归一化。
- The seed bourgeon ,seedling growth ,crop yield and heavy metals contents were influenced by contaminated soil. 土壤重金属污染影响了种子萌发、幼苗生长、作物产量及体内重金属含量,探讨了污染土壤的酶学评价方法。
- Apple stem grooving virus has been reported in most pome fruits producing areas.Although infection of the virus in fruits remains symptomless, it causes significant yield reduction. 摘要苹果茎沟病毒在仁果类果树上的感染较普遍，且一般不产生明显症状，给生产带来严重损失。
- How to break crop yield stagnation is a serious question warranting an explanation. 如何打破作物产量徘徊的局面是应找到答案的一个严重问题。
