【摘 要】
:
滦县地处华北平原东北部,耕地中有67万亩沙地,其中27亩万左右种植花生。据调查:单产达到150公斤以上的高产田有6万亩,占花生播种面积的22%;150公斤以下的中产田17万亩,占花生播种面
【机 构】
:
唐山市农业局技术站,滦县农业局!邮编:063008
论文部分内容阅读
滦县地处华北平原东北部,耕地中有67万亩沙地,其中27亩万左右种植花生。据调查:单产达到150公斤以上的高产田有6万亩,占花生播种面积的22%;150公斤以下的中产田17万亩,占花生播种面积的63%;单产在100公斤以下的低产田4万亩,占花生播种面积的15%。为了进一步提高花生
Luanxian County is located in the northeastern plain of North China, with 67 mu of cultivated land, of which 27 mu are planted with peanuts. According to the survey, there are 60,000 mu of high-yielding fields with a yield of more than 150 kg, accounting for 22% of the sown area of peanuts; 17 million mu of middle-yielding fields of 150 kg or less, accounting for 63% of peanut planting area; and low yield fields with a yield of less than 100 kg 4 million mu, accounting for 15% of the sown area of peanuts. In order to further improve peanuts
其他文献
This study investigated the formation and emission characteristics of nitricc oxide (NO) from flameless MILD (moderate or intensive low-oxygen dilution) combust
目的: 通过3.0T磁共振弥散张量成像技术(Diffusion Tensor Imaging; DTI),研究缺血性脑卒中后脑白质结构变化特点,并根据患者远期运动功能情况,探索与能够预测患者远期运动功能
Flow and heat transfer of a novel turbine shroud with throttle chamber under two kinds of orifice arrangements were numerically studied.The original shroud mode
“南保早”是用(红云33/谷农13)F1×(越冬青/圭幅3号)F1杂交重组,经多代抗瘟性筛选鉴定选育成的一个高产、抗病早籼中熟新品种。1993年通过南平市鉴定,确定为全区早稻试验示范推广种
通过对美国国家科学基金会资助管理相关数据的分析,展示了其再次延续资助比例高于首次延续资助比例、老资助率高于新人资助率、同行评议结果等级与资助可能性不具线性关系、
Film cooling combined with intal impingement cooling is one of the most effective technologies to protect the gas turbine vanes and blades from the hot gas.In t
Auto-cascade absorption refrigeration (ACAR) systems are a class of new cycles that can achieve low refrigeration temperatures by utilizing low-quality thermal
浙江之声是一个有着60多年历史的省级电台。之前,在频道定位问题上一直有些争论,新闻?综合,新闻?娱乐,新闻?文化。直到2010年下半年,频道专门召开了新闻工作会议,正式提出了