These significant increment in yield compensate for the 3 to 5 more months the grower has to wait for harvest when using densities of 3 , 300 to 5 , 000 plants , in comparison with the normal density of 1 , 400 - 1 , 600 plants per hectare ( table 1 ) 与传统的1400 ~ 1600株/公顷相比，使用3300 ~ 5000株/公顷的种植密度所获得的产量增加完全可以补偿种植者等待收获的3 ~ 5个月时间（表1 ） 。
What myr has pointed out in china is that many of the present day recommendations are outdated because they were either obtained with low inputs ( low yielding varieties , low fertilizer use , low plant populations , etc . ) or imbalanced fertilization 中国的最高产量研究指出，许多现行的推荐已过时，因其或在低投入（低产品种、低施肥量、低种植密度等）或在不平衡施肥的情况下获得。
Studies on the effects on the growht , yield , quality with different planting densities of the watermelon variety zhonghuaquanwang results that the best planting density is 500 individual plants in 667 m ^ 2 area with 3 stems of the grafted individual 摘要研究不同种植密度对于中华拳王西瓜生长、产量、品质等影响，结果表明，中华拳王嫁接西瓜采用三蔓整枝，每667平方公尺种植此品种的最佳密度为500株。
Firstly we maked sure method of isolating arabidopsisis mutant by thermal imagings in many ways on trial , optimize conditions for isolation , and confirm the good period of seedlings and fine density for isolation , select correct isolating pressure ( drought and h2o2 ) that is fit for isolate mutant . secondly we obtain an ml population derived from 0 . 4 % ethyl methanesulfonate ( ems ) - mutagenized wild type arabidopsis thaliana 本实验首先是对利用远红外成像技术筛选拟南芥突变体方法的可行性进行多方面的试验，优化筛选条件、确定筛选所需幼苗的生长时间、种植密度，界定用于筛选所需的胁迫(过氧化氢和干旱)选择压力。
The sub - model for design of population density was developed according to the principle of determining boll number from target yield , fruit node from boll number , fruit branch from fruit node and population density from fruit branch by integrating the effects of sowing date , cutout date , effective temperature accumulation above 12 , variety type , and fertilizer and water management levels . sowing rate was then decided by integrating the effects of different soil water and salt contents , ph , temperature and sowing style on seedling emergence rate with relative weight method 基于“以产定铃、以铃定节、以节定枝、以枝定苗”的原理，同时考虑播种日期、打顶日期、 12的有效积温、品种株型特性、肥水管理水平差异等因素来确定适宜的种植密度；在此基础上，应用相对权重法计算土壤含水量、含盐量以及整地质量和播种方式等多个生态环境因子对出苗率的综合影响，进而确定播种量。
