摘要
连续 4年 (1 999年春至 2 0 0 2年秋 )将微爆整地对核桃山地丰产建园初期的影响进行调查、分析 ,结果表明 ,成活率由 6 1 %提高到 97% ;枝条长度年均生长量增加了 2 4 cm,增长率为 5 8% ;枝条粗度 (周长 )年均生长量提高了 1 1 .3mm,增长率为 4 3% ;幼树挂果率由 4 6 %提高到 98% ,单株挂果数明显增加。分析其原因是 :微爆整地改良了土壤结构 ,提高了土壤蓄水能力 ,增加了土壤肥力。
Experiments on early effect of walnut garden prepari ng pits by minute b last from the spring of 1999 to the fall of 2002 showed that the productivity in creased from 61% to 97%.The length of each branch grew 24 cm every year,increase d by 58%.The circum ference of each branch grew 11.3 mm every year,increased by43%.The productivity of the walnuts increased from 46% to 98%.The number of thewalnuts per tree increased obviously.The reason was that the pits made by minute blast improved the structure of the soil,the ability of water saving and the lev el of soil fertility.
出处
《陕西林业科技》
2003年第2期21-22,共2页
Shaanxi Forest Science and Technology
