春小麦

In order to select high nitrogen-fixing azotobacter strains, nitrogenase activity of 13 strains separated in the rhizosphere in Gansu non-leguminous crop fields were measured by acetylene reduction method. Also the fertilization effect of the strains on spring wheat was investigated via pot experiment.

为挑选具有高固氮能力的自生固氮菌菌株，用乙炔还原法对甘肃省春小麦和玉米等非豆科作物根际土壤中分离所得的13株菌进行固氮酶活性测定，并通过盆栽试验对其进行春小麦肥效试验。

Willowleaf knotweed(Polygonum bungeanum Turcz.), Heartleaf cocklebur(Xanthium strumarium L.) at the dosage of 300～450 g/hm~2.The control effects of weed plant were 83%～89%,and those of fresh weight were 93%～98%.The opti...

适宜的施药时期为春小麦出苗后4~5叶期，阔叶杂草基本出齐，株高不超过5 cm，适宜的用药量为15%噻磺隆可湿性粉剂不低于300 g/hm2，在此推荐剂量下对春小麦安全。

The result shows that: The variation rhythm of the sensitivity index changed unanimously for Jensen,Blank and Stewart water production functions of spring wheat in Liangzhou city,the volume is small in the former stage,then become large at the middle stage,and less at the last stage. Jensen and Stewart water production functions are better of spring wheat in Gulang County in 1987-1989. The Variation rhythm of water deficiency sensitive index is unanimous: the volume are small at first,then large at middle,and diminish at last. The Variation rhythm of water deficiency sensitive index is unanimous in Jensen,Blank and Minhas of flax in Liangzhou county in 1987-1989. The water deficiency sensitive index in Gulang district in 1987-1989 models bad,are too many minus.

结果表明：1985-1986 年凉州春小麦Jensen 模型、Blank 模型和Stewart 模型的敏感指数变化规律接近一致，在前期较小，中期增大，最后再减小。1987-1989 年古浪春小麦水分生产函数以Jensen 模型和Stewart 模型拟合较好，其敏感指数变化规律比较一致，敏感指标值前期较小，中期增大，后期又减小。1983-1985 年凉州亚麻水分生产函数以Jensen 模型、Blank 模型和Minhas 模型敏感指标值变化规律比较一致：先减小，后增大，最后再减小。1987-1989 古浪亚麻敏感指数出现负值较多，模型拟合较差。

The result shows that: The variation rhythm of the sensitivity index changed unanimously for Jensen,Blank and Stewart water production functions of spring wheat in Liangzhou city,the volume is small in the former stage,then become large at the middle stage,and less at the last stage. Jensen and Stewart water production functions are better of spring wheat in Gulang County in 1987-1989. The Variation rhythm of water deficiency sensitive index is unanimous: the volume are small at first,then large at middle,and diminish at last. The Variation rhythm of water deficiency sensitive index is unanimous in Jensen,Blank and Minhas of flax in Liangzhou county in 1987-1989. The water deficiency sensitive index in Gulang district in 1987-1989 models bad,are too many minus. 3 Establishing the non-linear model to definitive the irrigation quota and dimension of single crop,according the three prototype Precipitation,allocating the limited water optimally according to full water supply,95 percent,75 percent and 50 percent. Economy benefit is the biggest aim function,so getting three groups for irrigation quota,irrigation dimension and benefit,the biggest benefit is the most optimal result.

结果表明：1985-1986 年凉州春小麦Jensen 模型、Bl(来源：10a1ABC论文网www.abclunwen.com)ank 模型和Stewart 模型的敏感指数变化规律接近一致，在前期较小，中期增大，最后再减小。1987-1989 年古浪春小麦水分生产函数以Jensen 模型和Stewart 模型拟合较好，其敏感指数变化规律比较一致，敏感指标值前期较小，中期增大，后期又减小。1983-1985 年凉州亚麻水分生产函数以Jensen 模型、Blank 模型和Minhas 模型敏感指标值变化规律比较一致：先减小，后增大，最后再减小。1987-1989 古浪亚麻敏感指数出现负值较多，模型拟合较差。3 建立单作物种植条件下灌溉定额与灌溉面积的确定的非线性规划模型，将有限的水量按照充分供水，95%、75%和50%供水来分配水资源，以经济效益最大为目标函数，得出三组灌区灌溉面积和效益结果，其中以效益最大为最优解。

In this paper, the evapotranspiration of spring wheat in Horqin sandy cropland was estimated and measured continuously by Bowen ratio energy balance approach and Lysimeter,and the relationship between the changes of the soil water content caused by irrigation and rainfall and evapotranspiration of spring wheat was analyzed.

运用波文比—能量平衡法和大型蒸渗仪对沙地春小麦的蒸散量进行了连续的测定和估算，并对由于降雨和灌溉所引起的土壤有效水分变化与沙地春小麦蒸散量之间的相关关系进行了初步探讨。

For example of the Shiyang River Basin along the Hexi Corrider,in Gansu province,made the imitial research of the major crop water production function and irrigation schedule optimal model,the results are following: 1Based on the related experimental datum gathered,drawing the relationship curve of several major crop yield and evapotranspiration,such as spring wheat,spring wheat-corn strip field,seed melon,sweet melon,cotton and flax and so on. The result shows these there:linearity and non-linear between crop yield and evapotranspiration.

本研究以甘肃省河西走廊石羊河流域为例，对其主要农作物的水分生产函数及灌溉制度优化模型作了初步研究，取得了以下成果： 1 根据收集的有关试验资料，绘制了春小麦、春小麦-玉米带田、籽瓜、白兰瓜、棉花和亚麻等几种主要农作物产量与耗水量的关系曲线，结果表明，产量与耗水量之间一般存在着线性与非线性的关系。

If all comes down to the Spring Wheat plantings on Tuesday's 3:00p report. If North Dakota and Minnesota finally got to planting Spring Wheat, the threat of several million acres going unplanted will fade but with a week of dry weather shows no intent we will take out 6.00 and push to 6.22. A break early next week sets up 5.64 as support. To achieve that we need a dry six to ten day forecast and a Tuesday Planting Report over 70% seeded in those two states.

周二会出台作物报告，如果报告显示北达科他州和明尼苏达州最终选择了种植春小麦的话价格料会承压，但如果显示由于干燥天气的影响使得没有种植春小麦的话价格可能突破600至622一线。

Over various phenological stages of spring wheat, the temperature increased, but it didn't exceed the suitable range.

在春小麦生长发育各阶段，气温都有所升高，但没有超出春小麦生长发育的适宜温度范围。

For understanding the yield and quality changes of spring wheat piled up in field after reaping in Qinghai province, we selected Qingchun 533, which was planted widely in Qinghai province, and Plateau 205(susceptible to preharvest sprouting), Plateau 115, Plateau 448 and Plateau 314 which were bred by our institute, piled up them as the quomodo farmer used, sampled them every nine days, and mensured yield, SDS sedimentation value and falling number value to trick the changes of wheat.

为了解青海省春小麦收割后田间堆放期间产量和品质的变化，选择近年育成的春小麦品种&高原205&、&高原115&、&高原448&和&高原314&以及曾为青海省主栽品种的&青春533&为材料，收刻后以农民常用的田间堆放方式进行堆放，每隔9d对其进行采样，测定产量、SDS沉淀位和降落数值的变化。

The results showed that spring wheat with plastic film mulches was able to improve the content of chlorophyll and protein of leaves in the earlier growing period and the average increase per day of the content of chlorophyll and protein of the mulched wheat increased by 31.49% and 7.94% than that of unmulched wheat respectively; but it could accelerate the decomposition of chlorophyll and protein in the later period.

结果表明，采用地膜覆盖栽培方法，在春小麦生长前期能明显提高叶片叶绿素和蛋白质的含量（日均增加量分别比露地春小麦高31.49%和7.94%），但后期又会加速其降解速率；MDA含量和细胞质膜相对透性均表现为覆膜处理高于露地处理（日均增加量分别比露地春小麦高71.96%~11.78%和2.42%~9.57%）。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。