【摘 要】
：
多年的生产实践表明,影响西瓜产量形成的关键期为6月上旬～7月中旬。我县这个时期大多处在梅雨季节,凡梅雨期降水量偏多、大雨、暴雨频繁的年份,西瓜座果难,病害发生重,大多为
论文部分内容阅读
多年的生产实践表明,影响西瓜产量形成的关键期为6月上旬～7月中旬。我县这个时期大多处在梅雨季节,凡梅雨期降水量偏多、大雨、暴雨频繁的年份,西瓜座果难,病害发生重,大多为减产年。如1983、1985、1986年亩产量都在1500公斤以下;反之,梅雨期降水量偏少、大雨、暴雨少的年
Years of production practice shows that the key period affecting the production of watermelon is from early June to mid July. Most of my county in this period in the rainy season, where the precipitation is too heavy in the rainy season, frequent heavy rains, heavy rain, watermelon fruit difficult, heavy diseases occur, mostly for cut years. For example, in 1983, 1985 and 1986, the annual output of mu was less than 1,500 kg; on the contrary, the rainfall in the rainy season was less than normal,
其他文献
本文分别对电加热化霜,自然化霜和冷风化霜三种化霜方式进行了实验研究.实验中对化霜量、化霜速度、蒸发器的进出口壁面温度以及冷藏室温度的动态变化进行了测量.绘制了不化
The Central Government's No.1 Document for 2021 saw its publication on February 21, showcasing a general dedication to accelerating the vitalization of the rura
分析目前冰箱凝露评价方法存在的不足,从理论上阐述了热像法量化评价冰箱凝露性能的思路,并结合具体实例提出了一种基于热像图的量化分析方法和凝露性能判定准则,能够迅速、
Since the Belt and Road Initiative was proposed in 2013, China's total non-financial direct investment in countries along the Belt and Road routes has reached $
我们于1986年冬至1987年春,进行了太阳池温室的试验研究,结果表明在北京地区利用太阳池温室生产喜温蔬菜是可行的,开创了利用太阳池代替烧煤增温的新途经。太阳池也叫太阳能
本文从寻找直冷式冰箱制冷系统噪声产生机理出发,提出了一种可以有效降低冰箱噪声的制冷系统,并且通过噪声实验验证了该制冷系统在降低冰箱噪声方面的有效性,还与普通的冰箱
本文选取新鲜卷心菜、葡萄在冰箱冷藏室中贮藏,通过感官评定与vc、叶绿素、可溶性固形物的测试,研究了果蔬在多色复合光照射条件下的保鲜效果.实验表明,多色复合光照能促进卷
Recent events suggest British political circles are confused about what kind of relationship they want with China. This lack of a coherent strategy is certain t
At his first international conferences as the leader of the United States, President Joe Biden had a short but emphatic message for listening world leaders: “A
通过对冰箱压缩机电机运行特性和往复压缩机运行特点的分析,指出电机性能对压缩机在冰箱匹配性能的影响;通过实验表明电机经过优化调整后对其匹配性能有着很大的改善.本文所