论文部分内容阅读
一、西瓜的需肥规律 西瓜生长季短,枝蔓繁茂,果实大,生长迅速,因此,需肥量也较大。根据一般的概念,西瓜已成喜钾作物的代表。将西瓜的各组成部分分析后,可看出西瓜果皮中钾的含量最多,氮和磷则以种子中为多,在整个果实中以钾最多,氮次之,磷最少。西瓜的不同生育期对氮、磷、钾三要素的要求也是不相同的。按每株每日吸收的三要素的量计算。发芽期吸收氮、磷、钾的比例为6.7:1:2.7,苗期为
First, watermelon needs fertilizer law Watermelon growing season is short, branches and lush, fruit, rapid growth, therefore, need greater amount of fat. According to the general concept, watermelon has become the representative of potassium-like crops. The analysis of the various components of watermelon, we can see that the watermelon peel most of the content of potassium, nitrogen and phosphorus are more in the seed, in the whole fruit to potassium up, followed by nitrogen, phosphorus at least. Watermelon at different growth stages of nitrogen, phosphorus and potassium requirements of the three elements are not the same. Calculated by the amount of three elements absorbed per plant per day. Germination of nitrogen, phosphorus and potassium absorption ratio of 6.7: 1: 2.7, seedling stage