杂草对果树的危害是众所周知的。一年生杂草对养分的吸收能力比多年生果树要大得多。杂草繁茂常使果树受旱害,光照不足,病虫滋生,果树生长严重受抑制。据国外估计,杂草会使果树产量损失20～30%,他们主张在果树根际范围内应绝对无草。我国北方落叶果园(苹果和梨)每年除草用工仅次于植保,约占总用工量的三分之一左 Weeds on the hazards of fruit trees is well known. Annual weeds absorb nutrients much more than perennial fruit trees. Weeds often lush fruit trees droughts, inadequate lighting, pests breeding, fruit tree growth was severely inhibited. According to foreign estimates, weeds will result in 20-30% loss of fruit production, they advocate the rhizosphere in the fruit should be absolutely grass-free. In northern China, deciduous orchards (apples and pears) spend less on weeding only once a year, accounting for about one third of the total workforce