Arid and semiarid areas are main areas of food production in our country. Water shortage and nutrient deficiency are two key factors that restricted crop production in these areas. 干旱和半干旱地区是我国重要的农业生产区,水分不足和养分缺乏是制约其生产发展的两个关键因素。
Soil arid and climate productivity over Gansu loess plateau during crop growth period 甘肃黄土高原作物生长期土壤干旱及气候生产力特征分析
, climate was temperate and arid with grassland vegetation, ancestors planted dry crop; 植被以草原为主,气候温干,先人以旱作农业为主;
Crop-water model for arid crop land in loess plateau 黄土旱区作物-水分模型
Determination of Regional Basal Coefficient of the Grasses in Arid Area From Dual Crop Coefficient Approach 由双作物系数法确定干旱地区人工牧草基本作物系数地区值的研究
Straw mulch is one of the most important cultivation technology in arid zones of Northern China. It can improve capacity of water storage, water retention and water supply in soil, leading to increase of crop yield in many areas. 秸秆覆盖是我国北方旱地农业的一项重要栽培措施,在提高土壤蓄水、保水和供水能力方面具有显著的作用,同时在许多地区能够显著提高作物产量。
Sorghum, as an important forage plant and main grain crop which spread broadly in the arid or semi-arid tropics, is the fifth most important cereal crop worldwide after wheat, rice, maize and barley. 高粱作为世界五大粮食作物之一,广泛分布在世界的热带干旱和半干旱地区,是许多国家重要的粮食来源和饲料作物。
Models of leaf area index for American crops in default are not suitable for Chinese. And more unsuitable for semi arid water-deficient irrigation plain of the actual crop evapotranspiration calculation. 模型中默认的叶面积指数是针对美国作物的,不适合我国半干旱区的缺水平原灌区作物实际腾发量的计算。
High salinity, especially in the western arid and semiarid regions of China, is a most serious environmental stress that imposes both ionic toxicity and osmotic stress, leading to the reduction of plant growth and crop production. 盐碱土壤主要分布于我国的中西部地区,高盐产生的离子毒害和氧化胁迫盐严重影响植物的生长,造成粮食减产,是最为严重的环境问题之一。
Located in the northwest arid and semi-arid areas, Gansu province and its surrounding areas is a production base of grain crop and commercial crop in Northwest China in which technical HCHs was heavily used. 位于西北干旱半干旱地区的甘肃省及其周边地区是西北粮食作物和经济作物的生产基地,有大量使用HCHs的历史。
But rapeseed planting is facing many risks in Hubei. Such as weather is changeable, cold and warm air mass change frequently. Fatal low temperature, flood, arid, and tornado often appeared, etc* Rapeseed is a very important technical crop in winter. 但是湖北省油菜种植面临着许多自然风险,例如气候多变、冷暖气团交替十分频繁,且常有低温、洪涝、干旱、龙卷风等灾害性天气出现。