The classification of cultivation measures for spring maize was studied with the principal factor analysis and regression methods.
应用因子分析和回归方法对春玉米高产农艺措施进行了数量分类与寻优。
Nitrogen nutrition level has some influence on the growth and development of spring maize leaves.
氮素营养水平对春玉米的叶片生长有一定的影响。
The effect of nitrogen dosage on starch content and key enzyme activity in composing starch in kernels of spring maize was studied.
以不同品种春玉米为试验材料，研究氮肥施用量对春玉米子粒淀粉含量及淀粉合成关键酶活性的影响。
Winter wheat yield was more sensitive to rainfall and spring maize yield more influenced by previous crop stubbles in rotation system.
在轮作条件下，冬小麦的产量更容易受到降水的影响，而春玉米的产量更容易受茬口的影响。
With 312-d optimized saturation design, field experiment was conducted to study yield effect of water and fertilizer coupling on spring maize.
采用312-D最优饱和设计，开展了春玉米水肥耦合作用田间试验研究。
Results showed that nitrogen quantity was the chief factor to affect spring maize yield, irrigation quantity was the second factor, phosphorus quantity was the third.
结果表明，在试验年施氮量对产量影响最大，灌溉量次之，施磷量最小。
The main growth and developmental characteristics of spring maize were shown as follows:higher plant height increment per day and exuberant growth of leaves in the early stage;
春玉米的主要生长发育特性为：大田初期株高日增量大，叶片早生快发，生长旺盛；
In this paper, root samples of winter wheat and spring maize under intercropping were taken with large-bore soil auger, and the dynamics of their spatiotemporal distribution were studied.
采用大口径土钻对间作种植模式下冬小麦与春玉米根系进行取样，分析了两种作物根系的空间分布及动态变化规律。
MDA content was increased by drought treatment at different growth stages in spring maize functional leaves, and increased mostly by drought treatment at seedling and the increased percent was 57.77%.
不同生育时期干旱处理均使功能叶片中MDA含量增加，苗期干旱处理时增加幅度最大，达57.77%。
Spring maize grain starch content changed as a single peak curve after silking.
春玉米籽粒淀粉组分吐丝后呈单峰曲线变化。
Spring maize grain starch content changed as a single peak curve after silking.
春玉米籽粒淀粉组分吐丝后呈单峰曲线变化。
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