论文部分内容阅读
硼是植株各生长阶段不可缺少的微量营养元素。①棉株在叶片中的糖分、氮、磷转移到果实。②茎中输导组织的形成和维持。③氨基酸和蛋白质的合成。④花粉管的形成和蕾、花、铃的发育都需要硼。在美国阿肯色斯州缺硼的土壤上,每亩施用0.5到2磅硼,可增产籽棉200磅～1000磅。在缺硼土壤中,单施氮肥会减产,而同时施用硼和氮则可大幅度增产。在缺少硼和钾的地区,单施钾会导致减产,同时施钾施硼则增产。(一)缺硼的症状氮和碳水化合物趋向积累于叶片中,果实无法合成所必需的化合物。这种植株的叶子常常呈深绿
Boron is an indispensable micronutrient in all growth stages of plants. ① cotton plant leaves in the sugar, nitrogen, phosphorus transferred to the fruit. ② the formation of stem tissue and maintenance. ③ amino acids and protein synthesis. ④ pollen tube formation and buds, flowers, the development of bells need boron. Applying 0.5 to 2 pounds of boron per acre on boron-deficient soil in the state of Arkansas in the United States can increase 200 pounds to 1,000 pounds of seed cotton. In boron-deficient soils, application of nitrogen fertilizer alone can reduce production, while application of boron and nitrogen can significantly increase production. In areas lacking boron and potassium, application of potassium alone resulted in a decrease in yield while application of boron to potassium increased yield. (A) the symptoms of boron deficiency Nitrogen and carbohydrates tend to accumulate in the leaves, the fruit can not synthesize the necessary compounds. The leaves of this plant are often dark green