论文部分内容阅读
三十年生温州蜜柑树不但能高产,且丰产性能相当稳定,没有大小年。我们试验的一株尾张,1944年定植,1971年冬列入丰产栽培试验,每年平均株产525斤。1977年1月27日至2月3日遭到-10.5℃的冰冻后,其他相邻的同龄桔树均已冻死,而这株树仍保存不少老叶片,还收果30多斤。经过一年的恢复,树势即达原有水平,去年收获592斤。单株稳产的主要农业技术措施是: 一、改良土壤和合理施肥桔树土层深厚,土质肥沃,是获得稳产高产的基础。这一单株的活土层有0.8米,每年施肥7—8次,年用氮肥量3公斤,磷肥2公斤,钾肥1.5公斤,并施入人粪尿200公斤,有机土杂肥料2担,以改良土壤。同时,在树冠外围挖了3个深1米、直径0.5米的圆筒穴,穴内垫入砂石,做渗水渗肥之用。除了土
Thirty-year-old Wenzhou orange tree not only high yield, and high yield performance is quite stable, no size year. We tested a tail piece, 1944 colonization, included in the winter of 1971 high yield cultivation test, the average annual yield of 525 catties. From January 27 to February 3, 1977, after being frozen at -10.5 ° C, other neighboring orange trees of the same age have been frozen to death. However, the tree still retains many old leaves and receives over 30 kg of fruit. After a year of recovery, the tree vigor reached the original level, 592 kg harvested last year. The main agricultural technical measures to stabilize a single plant are: First, improve the soil and fertilize the orange soil is deep, fertile soil, is to obtain a stable and high yield basis. This single live soil layer 0.8 meters, fertilization 7-8 times a year, the annual nitrogen fertilizer 3 kg, 2 kg of phosphate fertilizer, potassium 1.5 kg, and applied human excrement 200 kg, organic soil mixed fertilizer 2 dan, To improve the soil. At the same time, in the crown dug 3 deep 1 meter, 0.5 meters in diameter cylindrical hole, the cave pad into the sand, so seepage seepage fertilizer purposes. Except soil