g*5
3 楼
可以.
虽然我不住Houston, 但我知道休士顿有很多人成功的种植龙眼树.
龙眼可以短暂的忍受霜冻. 建议选南面种植. 幼树前几年要做霜冻保护.
虽然我不住Houston, 但我知道休士顿有很多人成功的种植龙眼树.
龙眼可以短暂的忍受霜冻. 建议选南面种植. 幼树前几年要做霜冻保护.
G*a
8 楼
喔,厉害幺!
M*y
9 楼
几天霜冻应该没问题. 家乡冬天有霜冻, 龙眼和荔枝都有.记得小时候冬天起来, 如果
有霜冻, 就说今天很冷.
有霜冻, 就说今天很冷.
g*5
11 楼
网上的:
Frost Protection Measures
Protect young frost-sensitive trees by wrapping the trunks and branches with
insulat-
ing material such as palm fronds, cornstalks, cardboard, or fiberglass.
During wet
weather, an outer covering of plastic film helps keep the insulating
materials dry, but
plastic alone provides very little frost protection. Cover the trunks from
the ground
level up to the main branches. Keep the ground around the trees as clean and
as free
from mulch, weeds, and ground cover as possible. Bare, moist soil radiates
more heat
than soil blanketed with mulch or ground cover, and this radiated heat helps
protect
trees from frost.
In cases where severe frosts are predicted, a 100-watt lamp (designed for
outdoor
use) placed in the interior of the tree will emit enough heat to reduce
frost damage.
Holiday lights are a festive alternative. Make sure your garden soil is
moist. If the soil
has good drainage, run a sprinkler system slowly or furrow-irrigate through
the night.
The water gives off heat, and this can help protect the trees from freezing.
Also, damp
soil retains heat better than dry soil, protecting roots and warming the air
near the
soil.
Commercial growers use large fans or wind machines to protect citrus trees
from
advective frosts caused by temperature inversions. The fans mix the layers
of warm
and cold air, raising the temperature at the surface. Wind machines, however
, are sel-
dom practical for a backyard gardener with a few trees.
【在 w*m 的大作中提到】
: 能不能提示一下如何做霜冻保护?
Frost Protection Measures
Protect young frost-sensitive trees by wrapping the trunks and branches with
insulat-
ing material such as palm fronds, cornstalks, cardboard, or fiberglass.
During wet
weather, an outer covering of plastic film helps keep the insulating
materials dry, but
plastic alone provides very little frost protection. Cover the trunks from
the ground
level up to the main branches. Keep the ground around the trees as clean and
as free
from mulch, weeds, and ground cover as possible. Bare, moist soil radiates
more heat
than soil blanketed with mulch or ground cover, and this radiated heat helps
protect
trees from frost.
In cases where severe frosts are predicted, a 100-watt lamp (designed for
outdoor
use) placed in the interior of the tree will emit enough heat to reduce
frost damage.
Holiday lights are a festive alternative. Make sure your garden soil is
moist. If the soil
has good drainage, run a sprinkler system slowly or furrow-irrigate through
the night.
The water gives off heat, and this can help protect the trees from freezing.
Also, damp
soil retains heat better than dry soil, protecting roots and warming the air
near the
soil.
Commercial growers use large fans or wind machines to protect citrus trees
from
advective frosts caused by temperature inversions. The fans mix the layers
of warm
and cold air, raising the temperature at the surface. Wind machines, however
, are sel-
dom practical for a backyard gardener with a few trees.
【在 w*m 的大作中提到】
: 能不能提示一下如何做霜冻保护?
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