单词 | self-thinning |
释义 | > as lemmasself-thinning self-thinning n. Brit. , U.S. (a) the death or spontaneous casting off of branches, fruit, etc., from a plant, ensuring the remaining parts of the plant have adequate room to grow; (b) a natural progressive decline in the density of a population (esp. of plants) that occurs as its members increase in size or as the population increases in number; frequently attributive.ΚΠ 1869 Ann. Rep. Commissioner Agric. 1868 250 in U.S. Congress. Serial Set (40th Congr., 3rd Sess.: House of Representatives Executive Doc.) XV Good management may postpone the ‘self-thinning’, by the inside, shaded, and weak bottom branches dying out. 1893 J. Nisbet Brit. Forest Trees 280 The self-thinning of the pole-forest. 1926 Amer. Jrnl. Bot. 13 417 By the term ‘self-thinning’ reference is made to the ability of the Delicious to drop its blossoms down to a maximum of usually one to the spur. 1986 Oikos 46 122 (title) Is there a self-thinning rule for animal populations? 2004 Times 16 Oct. (Weekend Review section) 31 That extraordinary self-thinning process whereby the tree sheds the excess fruit because it knows how much fruit it can safely bring through to harvest time. 2013 T. Beck Princ. Ecol. Landscape Design ii. 46 Allow self-thinning to maintain the balance between plant density and plant size. < as lemmas |
随便看 |
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。